[comment]: # (autogenerated content, do not edit)
# Games

- **[0 A.D.](../0_ad.md)** (C, C++, JavaScript, GPL-2.0, beta)
- **[1oom](../1oom.md)** (C, GPL-2.0, mature)
- **[2006-rebotted](../2006-rebotted.md)** (Java, 2-clause BSD, mature)
- **[2048](../2048.md)** (JavaScript, MIT, mature)
- **[2H4U](../2h4u.md)** (C++, GPL-2.0, mature, inactive since 2007)
- **[3D Pong](../3d_pong.md)** (C, GPL-2.0, beta, inactive since 2004)
- **[3d.city](../3dcity.md)** (JavaScript, GPL-3.0, mature, inactive since 2016)
- **[3Dc](../3dc.md)** (C, GPL-2.0, mature, inactive since 2000)
- **[4D Maze Game](../4d_maze_game.md)** (Java, Public domain, mature, inactive since 2008)
- **[4D-TRIS](../4d-tris.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[54321](../54321.md)** (C++, Custom, mature, inactive since 2001)
- **[A Planet's Revenge](../a_planets_revenge.md)** (Python, GPL-3.0, beta, inactive since 2008)
- **[A7Xpg](../a7xpg.md)** (D, 2-clause BSD, beta, inactive since 2005)
- **[Abe's Amazing Adventure](../abes_amazing_adventure.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[Abuse](../abuse.md)** (C++, Lisp, Public domain, GPL-2.0, WTFPL, mature, inactive since 2011)
- **[Achtung, die Kurve!](../achtung_die_kurve.md)** (JavaScript, AGPL-3.0, mature)
- **[ACM](../acm.md)** (C, GPL-2.0, mature, inactive since 2000)
- **[AdaGate](../adagate.md)** (Ada, GPL-3.0, mature)
- **[Adanaxis](../adanaxis.md)** (C++, GPL-2.0, mature, inactive since 2007)
- **[AdaVenture](../adaventure.md)** (Ada, GPL-3.0, mature)
- **[Advanced Strategic Command](../advanced_strategic_command.md)** (C++, GPL-2.0, mature)
- **[adventure engine](../adventure_engine.md)** (Lua, MIT, mature, inactive since 2013)
- **[Afternoon Stalker](../afternoon_stalker.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[AI Wars](../ai_wars.md)** (Python, MIT, beta, inactive since 2010)
- **[Airstrike](../airstrike.md)** (C, GPL-2.0, beta, inactive since 2014)
- **[Aisleriot](../aisleriot.md)** (C, Scheme, GPL-3.0, mature)
- **[Ajax3d](../ajax3d.md)** (JavaScript, GPL-2.0, beta, inactive since 2007)
- **[Aklabeth](../aklabeth.md)** (C, GPL-2.0, mature, inactive since 2004)
- **[Aleph One](../aleph_one.md)** (C++, Lua, GPL-3.0, mature)
- **[Alex the Allegator 4](../alex_the_allegator_4.md)** (C, GPL-2.0, mature, inactive since 2003)
- **[Alien Assault Traders](../alien_assault_traders.md)** (PHP, GPL-2.0, beta, inactive since 2009)
- **[Alimer](../alimer.md)** (C++, MIT, beta)
- **[alive](../alive.md)** (C++, MIT, beta)
- **[Allure of the Stars](../allure_of_the_stars.md)** (Haskell, AGPL-3.0, beta)
- **[Amphetamine](../amphetamine.md)** (C, GPL-2.0, beta, inactive since 2008)
- **[Anagramarama](../anagramarama.md)** (C, GPL-2.0, beta, inactive since 2002)
- **[Ancient Beast](../ancient_beast.md)** (JavaScript, AGPL-3.0, mature)
- **[Andor's Trail](../andors_trail.md)** (Java, GPL-2.0, beta)
- **[android-chess](../android-chess.md)** (Java, C++, MIT, mature)
- **[Angband](../angband.md)** (C, GPL-2.0, mature)
- **[Angry Birds in Python](../angry_birds_in_python.md)** (Python, MIT, mature, inactive since 2017)
- **[Annex: Conquer the World](../annex_conquer_the_world.md)** (MegaGlest Script, GPL-3.0, mature, inactive since 2014)
- **[Antares](../antares.md)** (C++, LGPL-3.0, beta)
- **[Anteform](../anteform.md)** (Lua, GPL-3.0, beta)
- **[AntiChess](../antichess.md)** (Java, MIT, mature, inactive since 2003)
- **[antiyoy](../antiyoy.md)** (Java, GPL-3.0, beta)
- **[Anura](../anura.md)** (C, C++, zlib, mature)
- **[Apricots](../apricots.md)** (C++, GPL-2.0, beta, inactive since 2003)
- **[aquastax](../aquastax.md)** (JavaScript, MIT, beta)
- **[Arashi-JS](../arashi-js.md)** (JavaScript, GPL-2.0, beta, inactive since 2010)
- **[Ardentryst](../ardentryst.md)** (Python, GPL-3.0, mature, inactive since 2009)
- **[Ares Dogfighter](../ares_dogfighter.md)** (Java, GPL-3.0, beta, inactive since 2016)
- **[Argentum Online](../argentum_online.md)** (Visual Basic, GPL-2.0, AGPL-3.0, beta, inactive since 2014)
- **[Armagetron Advanced](../armagetron_advanced.md)** (C++, GPL-2.0, mature)
- **[Armies](../armies.md)** (C++, GPL-3.0, mature, inactive since 2007)
- **[Armor Alley](../armor_alley.md)** (JavaScript, CC-BY-NC-3.0, beta)
- **[Artillery Duel Reloaded](../artillery_duel_reloaded.md)** (Python, GPL-3.0, beta, inactive since 2012)
- **[Arx Libertatis](../arx_libertatis.md)** (C++, GPL-3.0, mature)
- **[asdf](../asdf.md)** (JavaScript, MIT, mature)
- **[AssaultCube](../assaultcube.md)** (C, C++, Custom, mature, inactive since 2018)
- **[AstroMenace](../astromenace.md)** (C++, C, GPL-3.0, mature)
- **[ativayeban](../ativayeban.md)** (C, C++, GPL-2.0, mature, inactive since 2015)
- **[Atomic Tanks](../atomic_tanks.md)** (C++, GPL-2.0, mature, inactive since 2016)
- **[Atomiks](../atomiks.md)** (C, GPL-3.0, mature, inactive since 2015)
- **[Atomix](../atomix.md)** (C, GPL-2.0, mature)
- **[Atrinik](../atrinik.md)** (C, Python, GPL-2.0, mature, inactive since 2016)
- **[Attal: Lords of doom](../attal_lords_of_doom.md)** (C++, GPL-2.0, mature, inactive since 2008)
- **[Augustus](../augustus.md)** (C, C++, AGPL-3.0, mature)
- **[Aussenposten](../aussenposten.md)** (JavaScript, MIT, beta, inactive since 2015)
- **[Avanor](../avanor.md)** (C++, Lua, GPL-2.0, beta, inactive since 2008)
- **[Azimuth](../azimuth.md)** (C, GPL-3.0, mature)
- **[Bacon2D](../bacon2d.md)** (C++, MIT, beta, inactive since 2018)
- **[Balder2D](../balder2d.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[Ball and Paddle](../ball_and_paddle.md)** (C++, Scheme, GPL-3.0, beta, inactive since 2009)
- **[Ball And Wall](../ball_and_wall.md)** (JavaScript, MIT, mature, inactive since 2015)
- **[Ballerburg SDL](../ballerburg_sdl.md)** (C, GPL-3.0, mature)
- **[Barony](../barony.md)** (C++, GPL-3.0, mature)
- **[Bastet](../bastet.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Batalla Naval](../batalla_naval.md)** (C, GPL-2.0, mature, inactive since 2002)
- **[Batrachians](../batrachians.md)** (C++, GPL-2.0, beta, inactive since 2012)
- **[Battery](../battery.md)** (Java, EPL-2.0, Custom, mature, inactive since 2009)
- **[Battle City](../battle_city.md)** (C, C++, Pascal, GPL-3.0, mature, inactive since 2013)
- **[Battle Tanks](../battle_tanks.md)** (C++, GPL-2.0, mature, inactive since 2009)
- **[Battlefield Java](../battlefield_java.md)** (Java, GPL-3.0, beta, inactive since 2011)
- **[Battleround](../battleround.md)** (Java, Apache-2.0, beta, inactive since 2015)
- **[Battles of Antargis](../battles_of_antargis.md)** (C, C++, GPL-2.0, beta, inactive since 2014)
- **[Beat Harvester](../beat_harvester.md)** (Python, GPL-2.0, beta, inactive since 2009)
- **[Berusky II](../berusky_ii.md)** (C++, GPL-3.0, beta)
- **[Berusky](../berusky.md)** (C++, GPL-3.0, mature)
- **[Betrayer's Moon Tactics](../betrayers_moon_tactics.md)** (JavaScript, GPL-2.0, beta, inactive since 2006)
- **[BetterSpades](../betterspades.md)** (C, GPL-3.0, beta)
- **[Between](../between.md)** (PHP, C++, ?, beta, inactive since 2010)
- **[Billiards](../billiards.md)** (Lua, Objective-C, GPL-3.0, beta, inactive since 2012)
- **[Biniax](../biniax.md)** (C, zlib, mature, inactive since 2012)
- **[Biogenesis](../biogenesis.md)** (Java, GPL-2.0, beta)
- **[Birth of the Empires](../birth_of_the_empires.md)** (C++, Custom, mature, inactive since 2016)
- **[Bitfighter](../bitfighter.md)** (C, C++, GPL-2.0, mature)
- **[BitRiot](../bitriot.md)** (C++, Apache-2.0, beta, inactive since 2017)
- **[Black Shades Elite](../black_shades_elite.md)** (?, ?, beta, inactive since 2007)
- **[BlackNova Traders](../blacknova_traders.md)** (PHP, JavaScript, GPL-2.0, beta, inactive since 2012)
- **[Blackvoxel](../blackvoxel.md)** (C++, GPL-3.0, mature)
- **[Bladecoder Adventure Engine](../bladecoder_adventure_engine.md)** (Java, Apache-2.0, mature)
- **[BlakedAwesomenaughts](../blakedawesomenaughts.md)** (JavaScript, PHP, MIT, beta, inactive since 2015)
- **[Blasphemer](../blasphemer.md)** (None, None, mature, inactive since 2017)
- **[Blinken](../blinken.md)** (C++, GPL-2.0, mature)
- **[Blitwizard](../blitwizard.md)** (C, C++, Lua, zlib, beta, inactive since 2015)
- **[Blitzkrieg](../blitzkrieg.md)** (Java, GPL-3.0, beta, inactive since 2012)
- **[Blob Wars : Attrition](../blob_wars_attrition.md)** (C, C++, GPL-3.0, mature)
- **[Blob Wars Episode 2 : Blob And Conquer](../blob_wars_episode_2_blob_and_conquer.md)** (C++, GPL-2.0, mature, inactive since 2016)
- **[Blobby Volley 2](../blobby_volley_2.md)** (C++, GPL-2.0, mature, inactive since 2017)
- **[Bloboats](../bloboats.md)** (C++, GPL-2.0, mature, inactive since 2006)
- **[Blobwars: Metal Blob Solid](../blobwars_metal_blob_solid.md)** (C++, GPL-2.0, mature)
- **[Block Attack - Rise of the Blocks](../block_attack-rise_of_the_blocks.md)** (C++, GPL-2.0, mature)
- **[BlockOut II](../blockout_ii.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[Bloodmasters](../bloodmasters.md)** (C#, GPL-2.0, mature, inactive since 2008)
- **[boardgame.io](../boardgameio.md)** (JavaScript, TypeScript, MIT, beta)
- **[BomberClone](../bomberclone.md)** (C, GPL-2.0, beta, inactive since 2010)
- **[Bombermaaan](../bombermaaan.md)** (C++, GPL-3.0, mature, inactive since 2010)
- **[Bombic2](../bombic2.md)** (C++, GPL-2.0, beta, inactive since 2010)
- **[Bombic](../bombic.md)** (C++, Objective-C, GPL-2.0, beta, inactive since 2005)
- **[Bombman](../bombman.md)** (Python, CC0, mature)
- **[Boohu](../boohu.md)** (Go, ISC, beta)
- **[BOOM: Remake](../boom_remake.md)** (C++, Custom, mature)
- **[Bos Wars](../bos_wars.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[Boson](../boson.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[Boulder Dash](../boulder_dash.md)** (Java, MIT, mature, inactive since 2015)
- **[Bouncy the Hungry Rabbit](../bouncy_the_hungry_rabbit.md)** (Python, GPL-2.0, mature, inactive since 2007)
- **[Brain Workshop](../brain_workshop.md)** (Python, GPL-2.0, mature, inactive since 2011)
- **[bratwurst](../bratwurst.md)** (Lisp, GPL-2.0, mature, inactive since 2009)
- **[Breakout-VR](../breakout-vr.md)** (C#, MIT, beta, inactive since 2017)
- **[Bridge Command](../bridge_command.md)** (C++, GPL-2.0, mature)
- **[Brikx](../brikx.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[BRIQUOLO](../briquolo.md)** (C++, GPL-3.0, mature, inactive since 2008)
- **[British Bingo](../british_bingo.md)** (JavaScript, GPL-3.0, mature)
- **[Brogue](../brogue.md)** (C, AGPL-3.0, mature)
- **[BrowserQuest](../browserquest.md)** (JavaScript, MPL-2.0, mature)
- **[Brutal Chess](../brutal_chess.md)** (C++, GPL-2.0, beta, inactive since 2007)
- **[BStone](../bstone.md)** (C++, GPL-2.0, mature)
- **[buggyGame](../buggygame.md)** (Python, GPL-2.0, beta, inactive since 2007)
- **[BurgerSpace](../burgerspace.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[Bygfoot](../bygfoot.md)** (Java, GPL-2.0, beta)
- **[BZFlag](../bzflag.md)** (C++, LGPL-2.1, MPL-2.0, mature)
- **[C-Dogs SDL](../c-dogs_sdl.md)** (C, GPL-2.0, mature)
- **[C-evo](../c-evo.md)** (Pascal, Public domain, GPL-3.0, mature, inactive since 2013)
- **[C3DE](../c3de.md)** (C#, MIT, beta)
- **[c64-nuclearreaction](../c64-nuclearreaction.md)** (C, Assembly, GPL-3.0, mature, inactive since 2014)
- **[Cabbages and Kings](../cabbages_and_kings.md)** (Python, MIT, mature)
- **[Cadaver](../cadaver.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[CaesarIA](../caesaria.md)** (C++, JavaScript, GPL-3.0, beta)
- **[Candy Box 2](../candy_box_2.md)** (TypeScript, JavaScript, GPL-3.0, mature, inactive since 2013)
- **[Cannon Smash](../cannon_smash.md)** (C++, GPL-2.0, beta, inactive since 2003)
- **[Cannonball](../cannonball.md)** (C++, MAME, beta)
- **[Canta](../canta.md)** (Python, GPL-3.0, beta, inactive since 2011)
- **[Caph](../caph.md)** (C, GPL-3.0, mature, inactive since 2010)
- **[Card Stories](../card_stories.md)** (JavaScript, Python, AGPL-3.0, beta, inactive since 2012)
- **[Cart Life](../cart_life.md)** (AGS Script, Custom, mature, inactive since 2014)
- **[Castle of the Winds in Elm](../castle_of_the_winds_in_elm.md)** (Elm, JavaScript, MIT, beta)
- **[Castle of the Winds](../castle_of_the_winds.md)** (JavaScript, MIT, beta, inactive since 2016)
- **[Castle-Combat](../castle-combat.md)** (Python, GPL-2.0, beta, inactive since 2006)
- **[Cat Mother Dead Justice](../cat_mother_dead_justice.md)** (C++, 3-clause BSD, GPL-2.0, beta, inactive since 2003)
- **[Cataclysm: Dark Days Ahead](../cataclysm_dark_days_ahead.md)** (C++, CC-BY-SA-3.0, mature)
- **[Cataclysm](../cataclysm.md)** (C++, CC-BY-SA-3.0, beta, inactive since 2012)
- **[CatacombGL](../catacombgl.md)** (C++, GPL-3.0, beta)
- **[CatacombSDL](../catacombsdl.md)** (C, GPL-2.0, mature, inactive since 2014)
- **[Catch Challenger](../catch_challenger.md)** (C++, GPL-3.0, mature)
- **[Cattle Bity](../cattle_bity.md)** (TypeScript, MIT, mature)
- **[CaveExpress](../caveexpress.md)** (C, GPL-3.0, mature)
- **[CavePacker](../cavepacker.md)** (JavaScript, C, C++, Lua, GPL-3.0, mature)
- **[CAVEZ of PHEAR](../cavez_of_phear.md)** (C, GPL-3.0, beta, inactive since 2011)
- **[cc94](../cc94.md)** (C++, Python, AGPL-3.0, beta)
- **[CCCP](../cccp.md)** (C++, AGPL-3.0, beta)
- **[Celestron](../celestron.md)** (Python, GPL-3.0, beta, inactive since 2012)
- **[CETech](../cetech.md)** (C, C++, CC0, beta)
- **[chainreaction](../chainreaction.md)** (Java, LGPL-3.0, mature, inactive since 2017)
- **[Chaos Esque Anthology](../chaos_esque_anthology.md)** (?, ?, mature)
- **[Chess3D](../chess3d.md)** (JavaScript, Python, GPL-3.0, mature, inactive since 2016)
- **[Children of Ur](../children_of_ur.md)** (Dart, JavaScript, MIT, beta)
- **[Childsplay](../childsplay.md)** (Python, GPL-3.0, mature)
- **[Chocolate Doom](../chocolate_doom.md)** (C, GPL-2.0, mature)
- **[Chocolate Duke3D](../chocolate_duke3d.md)** (C, GPL-2.0, Custom, beta, inactive since 2016)
- **[Choria](../choria.md)** (C++, C, Lua, GPL-3.0, mature)
- **[Chromium B.S.U.](../chromium_bsu.md)** (C++, Artistic License-1.0, mature)
- **[Chronoshift](../chronoshift.md)** (C++, GPL-2.0, beta)
- **[Chrzaszcz](../chrzaszcz.md)** (C++, GPL-3.0, beta, inactive since 2018)
- **[Chunk Stories](../chunk_stories.md)** (Kotlin, Java, LGPL-3.0, beta)
- **[Circus Linux!](../circus_linux.md)** (C, GPL-2.0, mature, inactive since 2000)
- **[Citybound](../citybound.md)** (Rust, JavaScript, AGPL-3.0, beta)
- **[Civil](../civil.md)** (Python, GPL-2.0, beta, inactive since 2003)
- **[Civilization: Call To Power 2 Source Project](../civilization_call_to_power_2_source_project.md)** (C, C++, Custom, mature)
- **[Civitas](../civitas.md)** (Java, Blender Script, GPL-2.0, beta, inactive since 2017)
- **[CivOne](../civone.md)** (C#, CC0, beta)
- **[ClanLib](../clanlib.md)** (C, C++, zlib, mature)
- **[Classic Blades of Exile](../classic_blades_of_exile.md)** (C++, GPL-2.0, mature)
- **[Classic RBDoom 3 BFG](../classic_rbdoom_3_bfg.md)** (C, C++, GPL-3.0, mature)
- **[Clonepoint](../clonepoint.md)** (C++, GPL-3.0, beta)
- **[Clumsy Bird](../clumsy_bird.md)** (JavaScript, MIT, mature, inactive since 2017)
- **[coab](../coab.md)** (C#, ?, mature)
- **[Colditz Escape](../colditz_escape.md)** (C, GPL-3.0, mature)
- **[Colobot: Gold Edition](../colobot_gold_edition.md)** (C++, GPL-3.0, mature)
- **[Colonization too](../colonization_too.md)** (C++, GPL-2.0, beta, inactive since 2004)
- **[Colossal Cave Adventure](../colossal_cave_adventure.md)** (Python, Apache-2.0, mature)
- **[Combat Simulator Project](../combat_simulator_project.md)** (C++, GPL-2.0, beta, inactive since 2010)
- **[Commander Genius](../commander_genius.md)** (C, C++, GPL-2.0, mature)
- **[CommandoJS](../commandojs.md)** (JavaScript, CoffeeScript, MIT, beta, inactive since 2012)
- **[Conquest](../conquest.md)** (C++, MIT, mature)
- **[Conquests](../conquests.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[Consomaton](../consomaton.md)** (TypeScript, MIT, mature, inactive since 2016)
- **[Construo](../construo.md)** (C++, GPL-3.0, beta, inactive since 2015)
- **[Core War](../core_war.md)** (C, Java, GPL-2.0, 2-clause BSD, mature)
- **[CorEngine](../corengine.md)** (C, zlib, beta, inactive since 2015)
- **[CorsixTH](../corsixth.md)** (Lua, C++, MIT, mature)
- **[Cosmo-Engine](../cosmo-engine.md)** (C, GPL-2.0, beta)
- **[Cosmosmash](../cosmosmash.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[CoTerminalApps](../coterminalapps.md)** (Ada, GPL-3.0, mature)
- **[Crack Attack!](../crack_attack.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Craft](../craft.md)** (C, Python, MIT, mature, inactive since 2017)
- **[CrappyBird](../crappybird.md)** (JavaScript, MIT, mature, inactive since 2017)
- **[Creep Smash](../creep_smash.md)** (Java, GPL-3.0, beta, inactive since 2011)
- **[Crimson Fields](../crimson_fields.md)** (C++, GPL-2.0, mature, inactive since 2010)
- **[Critterding](../critterding.md)** (C++, GPL-2.0, beta, inactive since 2013)
- **[Crossfire](../crossfire.md)** (C, Java, GPL-2.0, mature)
- **[CrossUO](../crossuo.md)** (C, C++, GPL-3.0, mature)
- **[Crosswords](../crosswords.md)** (Java, GPL-2.0, mature)
- **[Crown and Cutlass](../crown_and_cutlass.md)** (C++, Custom, beta, inactive since 2009)
- **[Crown](../crown.md)** (C, C++, Vala, MIT, beta)
- **[CrystalQuest](../crystalquest.md)** (JavaScript, MIT, mature, inactive since 2017)
- **[Cubosphere](../cubosphere.md)** (C, C++, GPL-3.0, beta)
- **[Cultivation](../cultivation.md)** (C++, Public domain, mature, inactive since 2010)
- **[Curse of War](../curse_of_war.md)** (C, C++, GPL-3.0, mature, inactive since 2014)
- **[CuteMaze](../cutemaze.md)** (C++, GPL-3.0, mature)
- **[Cuyo](../cuyo.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[Cytadela](../cytadela.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[Cytopia](../cytopia.md)** (C++, GPL-3.0, beta)
- **[D2X-XL](../d2x-xl.md)** (C++, Custom, GPL-2.0, mature, inactive since 2015)
- **[Daggerfall Unity](../daggerfall_unity.md)** (C#, MIT, mature)
- **[Daimonin](../daimonin.md)** (C, GPL-2.0, mature)
- **[Danger from the Deep](../danger_from_the_deep.md)** (C++, GPL-2.0, beta, inactive since 2011)
- **[Dark Destiny](../dark_destiny.md)** (Java, JavaScript, ?, mature, inactive since 2016)
- **[Dark Oberon](../dark_oberon.md)** (C++, GPL-2.0, mature, inactive since 2009)
- **[DarkCity](../darkcity.md)** (PHP, GPL-3.0, mature, inactive since 2012)
- **[DarkPlaces](../darkplaces.md)** (C, GPL-2.0, mature, inactive since 2014)
- **[Data Storm](../data_storm.md)** (C, Apache-2.0, mature, inactive since 2017)
- **[Dave Gnukem](../dave_gnukem.md)** (C++, GPL-2.0, mature)
- **[Dawn](../dawn.md)** (C++, GPL-3.0, beta, inactive since 2011)
- **[Deathchase 3D](../deathchase_3d.md)** (C, Perl, GPL-2.0, mature, inactive since 2002)
- **[Decker](../decker.md)** (Java, GPL-2.0, beta, inactive since 2013)
- **[Deer Portal](../deer_portal.md)** (C++, zlib, beta)
- **[Defendguin](../defendguin.md)** (C, GPL-2.0, mature, inactive since 2009)
- **[Deliantra](../deliantra.md)** (C, GPL-2.0, mature)
- **[DelverEngine](../delverengine.md)** (Java, Custom, mature)
- **[DemiGod](../demigod.md)** (Java, GPL-3.0, beta, inactive since 2013)
- **[Der Clou!](../der_clou.md)** (C, Custom, beta, inactive since 2017)
- **[DesktopAdventures](../desktopadventures.md)** (C, LGPL-2.1, beta)
- **[Destination Sol](../destination_sol.md)** (Java, Apache-2.0, mature)
- **[Devana](../devana.md)** (PHP, zlib, beta)
- **[Devilution](../devilution.md)** (C, C++, Unlicense, mature)
- **[DevilutionX](../devilutionx.md)** (C, C++, Unlicense, mature)
- **[DGEngine](../dgengine.md)** (C++, zlib, GPL-3.0, beta)
- **[dhewm3](../dhewm3.md)** (C, C++, GPL-3.0, mature)
- **[diablo-js](../diablo-js.md)** (Java, JavaScript, MIT, mature)
- **[Digbuild](../digbuild.md)** (C, C++, GPL-2.0, beta, inactive since 2011)
- **[Digger Remastered](../digger_remastered.md)** (C, GPL-2.0, mature, inactive since 2004)
- **[Digital: A Love Story](../digital_a_love_story.md)** (Ren'Py, CC-BY-NC-SA-3.0, mature)
- **[Dingo-Engine](../dingo-engine.md)** (Java, 3-clause BSD, beta, inactive since 2016)
- **[DirectX12GameEngine](../directx12gameengine.md)** (C#, MIT, beta)
- **[Divercity](../divercity.md)** (Java, GPL-3.0, beta, inactive since 2015)
- **[DNT](../dnt.md)** (C++, GPL-3.0, beta, inactive since 2016)
- **[Do It Yourself Doom With SDL](../do_it_yourself_doom_with_sdl.md)** (C++, MIT, beta)
- **[Domination](../domination.md)** (Java, GPL-3.0, mature)
- **[Domino On Acid](../domino_on_acid.md)** (Java, GPL-2.0, mature, inactive since 2009)
- **[Doom Legacy](../doom_legacy.md)** (C++, GPL-2.0, mature)
- **[DOOM Retro](../doom_retro.md)** (C, C++, GPL-3.0, mature)
- **[DOOM-iOS](../doom-ios.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[Doom64EX](../doom64ex.md)** (C, C++, GPL-2.0, mature)
- **[DOOM](../doom.md)** (C, Custom, mature, inactive since 2012)
- **[Doomsday Engine](../doomsday_engine.md)** (C, C++, GPL-2.0, GPL-3.0, LGPL-3.0, mature)
- **[Dope Wars](../dope_wars.md)** (C, GPL-2.0, mature, inactive since 2013)
- **[Dragon History - Dračí Historie](../dragon_history-dra_historie.md)** (Pascal, Script, GPL-2.0, mature, inactive since 2010)
- **[Dragon Hunt](../dragon_hunt.md)** (Python, GPL-2.0, mature)
- **[dRally](../drally.md)** (Assembly, C, MIT, beta)
- **[DreamChess](../dreamchess.md)** (C, GPL-3.0, beta)
- **[DreamZZT](../dreamzzt.md)** (C, C++, GPL-2.0, beta, inactive since 2007)
- **[Dreerally](../dreerally.md)** (C, C++, Custom, beta)
- **[DRL](../drl.md)** (Lua, Pascal, GPL-2.0, mature)
- **[Duck Marines](../duck_marines.md)** (Lua, zlib, mature, inactive since 2016)
- **[Duel Commander](../duel_commander.md)** (C, GPL-3.0, beta, inactive since 2009)
- **[Duke3D](../duke3d.md)** (C, GPL-2.0, beta, inactive since 2009)
- **[Duke3d_w32](../duke3dw32.md)** (C, GPL-2.0, beta, inactive since 2008)
- **[DukeGDX](../dukegdx.md)** (Java, GPL-3.0, beta)
- **[Dune 2 - The Maker](../dune_2-the_maker.md)** (Java, MIT, beta)
- **[Dune Dynasty](../dune_dynasty.md)** (C, GPL-2.0, mature, inactive since 2014)
- **[Dune II - The Maker](../dune_ii-the_maker.md)** (Java, MIT, beta)
- **[Dune Legacy](../dune_legacy.md)** (C++, GPL-2.0, mature)
- **[Dungeon Craft](../dungeon_craft.md)** (C++, GPL-2.0, mature)
- **[Dungeon Crawl Stone Soup](../dungeon_crawl_stone_soup.md)** (C++, Lua, GPL-2.0, mature)
- **[Dungeon Hero](../dungeon_hero.md)** (Java, MIT, mature)
- **[Dungeon Monkey Eternal](../dungeon_monkey_eternal.md)** (Python, GPL-2.0, mature, inactive since 2016)
- **[Dungeon Monkey Unlimited](../dungeon_monkey_unlimited.md)** (Pascal, LGPL-2.1, mature, inactive since 2010)
- **[Dungeon Quest](../dungeon_quest.md)** (Java, MIT, mature)
- **[Dunnet](../dunnet.md)** (Emacs Lisp, GPL-3.0, mature, inactive since 1992)
- **[Dust Racing 2D](../dust_racing_2d.md)** (C, C++, GPL-3.0, mature)
- **[DwarfCorp](../dwarfcorp.md)** (C#, MIT, mature)
- **[DXX-Rebirth](../dxx-rebirth.md)** (C, C++, Python, GPL-3.0, Custom, mature)
- **[DynaDungeons](../dynadungeons.md)** (GDScript, GPL-3.0, beta, inactive since 2018)
- **[eAdventure](../eadventure.md)** (Java, GPL-3.0, mature, inactive since 2014)
- **[Eat The Whistle](../eat_the_whistle.md)** (C, ?, mature, inactive since 2017)
- **[Ecksdee](../ecksdee.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[ECWolf](../ecwolf.md)** (C++, GPL-2.0, LGPL-2.1, zlib, MIT, IJG, Public domain, mature)
- **[EDuke32](../eduke32.md)** (C, C++, GPL-2.0, mature)
- **[Egoboo](../egoboo.md)** (C++, C, GPL-3.0, mature, inactive since 2015)
- **[Einstein Puzzle](../einstein_puzzle.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[ElonaFoobar](../elonafoobar.md)** (C++, Lua, MIT, mature)
- **[Elysium Engine](../elysium_engine.md)** (C, GPL-2.0, beta, inactive since 2006)
- **[Emilia Pinball](../emilia_pinball.md)** (C++, GPL-2.0, beta)
- **[Empty Clip](../empty_clip.md)** (C++, GPL-2.0, mature)
- **[EmptyEpsilon](../emptyepsilon.md)** (C, C++, Lua, GPL-2.0, mature)
- **[Endgame: Singularity](../endgame_singularity.md)** (Python, GPL-2.0, beta)
- **[Endless Sky](../endless_sky.md)** (C++, GPL-3.0, mature)
- **[Enduro tribute](../enduro_tribute.md)** (JavaScript, MIT, mature)
- **[Enigma](../enigma.md)** (C, C++, GPL-2.0, mature)
- **[EnTT Pacman](../entt_pacman.md)** (C, C++, MIT, mature)
- **[Eos, Dawn of Light: A Space Opera](../eos_dawn_of_light_a_space_opera.md)** (Python, MIT, beta, inactive since 2007)
- **[Epiar](../epiar.md)** (C, C++, Lua, GPL-2.0, beta)
- **[EPOH](../epoh.md)** (JavaScript, MIT, beta)
- **[erampage](../erampage.md)** (C, GPL-2.0, beta, inactive since 2015)
- **[Erebus](../erebus.md)** (C++, GPL-3.0, beta)
- **[Escape Towards The Unknown](../escape_towards_the_unknown.md)** (C, GPL-2.0, beta, inactive since 2016)
- **[Esenthel Engine](../esenthel_engine.md)** (C, C++, Custom, beta)
- **[ET: Legacy](../et_legacy.md)** (C, C++, Lua, GPL-3.0, mature)
- **[Eternal Lands](../eternal_lands.md)** (C, C++, Custom, mature)
- **[EternalWinterWars](../eternalwinterwars.md)** (Java, MIT, beta, inactive since 2014)
- **[Etterna](../etterna.md)** (C, C++, Lua, MIT, beta)
- **[Evil Cult](../evil_cult.md)** (Haxe, JavaScript, GPL-3.0, mature)
- **[Evol Online](../evol_online.md)** (C, GPL-3.0, mature)
- **[Excellent Bifurcation](../excellent_bifurcation.md)** (C, GPL-2.0, mature, inactive since 2007)
- **[Executive Man](../executive_man.md)** (JavaScript, Custom, mature, inactive since 2017)
- **[Extreme Tux Racer](../extreme_tux_racer.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Exult](../exult.md)** (C++, GPL-2.0, mature)
- **[ezQuake](../ezquake.md)** (C, C++, GPL-2.0, mature)
- **[F-1 Spirit](../f-1_spirit.md)** (C++, ?, beta, inactive since 2009)
- **[Fairy-Max](../fairy-max.md)** (C, Custom, mature, inactive since 2018)
- **[Falcon's Eye](../falcons_eye.md)** (C, NetHack General Public License, mature, inactive since 2004)
- **[Fall of Imiryn](../fall_of_imiryn.md)** (C++, Python, GPL-3.0, beta, inactive since 2009)
- **[Fallen Spire](../fallen_spire.md)** (Python, GPL-3.0, beta, inactive since 2009)
- **[Falling Time](../falling_time.md)** (C, C++, GPL-2.0, mature)
- **[Falltergeist](../falltergeist.md)** (C++, GPL-3.0, beta)
- **[Fanwor](../fanwor.md)** (C, GPL-2.0, mature)
- **[FAR Colony](../far_colony.md)** (Pascal, GPL-3.0, beta, inactive since 2014)
- **[Faur](../faur.md)** (C, Python, C++, GPL-3.0, beta)
- **[Fictional Air Combat](../fictional_air_combat.md)** (C, C++, GPL-3.0, beta, inactive since 2012)
- **[FIFE](../fife.md)** (C++, Python, LGPL-2.1, beta)
- **[First Strike](../first_strike.md)** (Java, MIT, mature, inactive since 2018)
- **[Fish Fillets - Next Generation](../fish_fillets-next_generation.md)** (C++, GPL-2.0, mature)
- **[Flappy Cow](../flappy_cow.md)** (Java, MIT, mature)
- **[FlightGear](../flightgear.md)** (C++, GPL-2.0, mature)
- **[FLTK Recycling Game!](../fltk_recycling_game.md)** (C++, LGPL-2.1, mature, inactive since 2014)
- **[FLTrator](../fltrator.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[Fluid Table Tennis](../fluid_table_tennis.md)** (JavaScript, MIT, mature, inactive since 2013)
- **[Flukz](../flukz.md)** (C++, GPL-2.0, beta, inactive since 2014)
- **[fonline](../fonline.md)** (C, C++, GPL-3.0, beta)
- **[FooBillard++](../foobillard++.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[FooBillard](../foobillard.md)** (C, GPL-2.0, mature, inactive since 2010)
- **[Forsaken](../forsaken.md)** (C, C++, GPL-2.0, Proprietary, beta, inactive since 2013)
- **[FQuake3](../fquake3.md)** (F#, GPL-2.0, beta, inactive since 2014)
- **[fRaBs](../frabs.md)** (Lisp, Public domain, mature, inactive since 2016)
- **[Free Allegiance](../free_allegiance.md)** (C++, MIT, mature)
- **[Free Heroes 2](../free_heroes_2.md)** (C++, GPL-2.0, beta, inactive since 2015)
- **[Free in the Dark (engine)](../free_in_the_dark_engine.md)** (C, C++, GPL-2.0, beta)
- **[Free Mars](../free_mars.md)** (Java, GPL-3.0, mature)
- **[Free Space Colonization](../free_space_colonization.md)** (C, GPL-2.0, beta, inactive since 2017)
- **[Free Tennis](../free_tennis.md)** (OCaml, GPL-2.0, beta, inactive since 2005)
- **[freeablo](../freeablo.md)** (C++, GPL-3.0, beta)
- **[freeaoe](../freeaoe.md)** (C++, GPL-3.0, beta)
- **[FreeBlocks](../freeblocks.md)** (C, Java, GPL-3.0, beta, inactive since 2015)
- **[Freeciv Alpha Centauri project](../freeciv_alpha_centauri_project.md)** (C, GPL-2.0, beta, inactive since 2003)
- **[Freeciv-web](../freeciv-web.md)** (JavaScript, Java, Python, AGPL-3.0, mature)
- **[Freeciv](../freeciv.md)** (C, GPL-2.0, mature)
- **[FreeCol](../freecol.md)** (Java, GPL-2.0, mature)
- **[FreeCS](../freecs.md)** (QuakeC, GPL-2.0, mature)
- **[Freedoom](../freedoom.md)** (None, None, beta)
- **[FreedroidRPG](../freedroidrpg.md)** (C, C++, Lua, GPL-2.0, mature)
- **[FreeFalcon](../freefalcon.md)** (C, C++, 2-clause BSD, inactive since 2014)
- **[freegish](../freegish.md)** (C, GPL-2.0, beta, inactive since 2017)
- **[Freekick 3](../freekick_3.md)** (C++, Python, GPL-3.0, mature, inactive since 2015)
- **[FreeLords](../freelords.md)** (Java, GPL-2.0, beta, inactive since 2017)
- **[Freeminer](../freeminer.md)** (C++, Lua, GPL-3.0, beta)
- **[Freenukum](../freenukum.md)** (C, GPL-3.0, beta, inactive since 2009)
- **[FreeOrion](../freeorion.md)** (C++, Python, GPL-2.0, beta)
- **[FreePrince](../freeprince.md)** (C, GPL-2.0, beta, inactive since 2011)
- **[FreeRails](../freerails.md)** (Java, C++, GPL-2.0, beta, inactive since 2008)
- **[FreeRCT](../freerct.md)** (C++, GPL-2.0, beta, inactive since 2016)
- **[Freeserf.net](../freeserfnet.md)** (C#, GPL-3.0, mature)
- **[Freeserf](../freeserf.md)** (C, C++, GPL-3.0, mature)
- **[FreeSiege](../freesiege.md)** (C++, GPL-3.0, beta)
- **[FreeSims](../freesims.md)** (C#, MPL-2.0, beta)
- **[FreeSO](../freeso.md)** (C#, MPL-2.0, beta)
- **[Freestars](../freestars.md)** (C++, GPL-2.0, beta, inactive since 2008)
- **[FreeSynd](../freesynd.md)** (C++, GPL-2.0, beta, inactive since 2017)
- **[FreeTrain](../freetrain.md)** (C#, LGPL-2.1, beta, inactive since 2009)
- **[freeVikings](../freevikings.md)** (Ruby, GPL-2.0, beta)
- **[Frets on Fire X](../frets_on_fire_x.md)** (Python, GPL-2.0, mature)
- **[Frets on Fire](../frets_on_fire.md)** (Python, GPL-2.0, mature, inactive since 2008)
- **[Freya Game Engine](../freya_game_engine.md)** (Java, LGPL-2.1, beta, inactive since 2002)
- **[Friking Shark](../friking_shark.md)** (C++, GPL-3.0, mature)
- **[Froggix](../froggix.md)** (Python, GPL-3.0, beta, inactive since 2009)
- **[Frozen Bubble](../frozen_bubble.md)** (Perl, GPL-2.0, mature, inactive since 2012)
- **[Fujo](../fujo.md)** (Python, CC-BY-SA-4.0, mature, inactive since 2014)
- **[FunLabyrinthe](../funlabyrinthe.md)** (Pascal, GPL-2.0, mature, inactive since 2012)
- **[Galaxy Forces V2](../galaxy_forces_v2.md)** (C++, Public domain, mature)
- **[GalaxyMage Redux](../galaxymage_redux.md)** (Python, GPL-2.0, beta, inactive since 2011)
- **[GalaxyNG](../galaxyng.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[GameCake](../gamecake.md)** (C, C++, Lua, MIT, mature)
- **[GameLV](../gamelv.md)** (C++, GPL-2.0, beta)
- **[Gang Garrison 2](../gang_garrison_2.md)** (Game Maker Script, MPL-2.0, mature)
- **[Garith](../garith.md)** (C++, LGPL-2.1, mature, inactive since 2013)
- **[GCompris](../gcompris.md)** (C, Python, GPL-3.0, mature, inactive since 2016)
- **[GDash](../gdash.md)** (C++, MIT, beta)
- **[GDHexGrid](../gdhexgrid.md)** (GDScript, MIT, mature)
- **[GearHead 2](../gearhead_2.md)** (Pascal, LGPL-2.0, beta)
- **[GearHead](../gearhead.md)** (Pascal, LGPL-2.1, Apache-2.0, mature)
- **[Gee Whiz](../gee_whiz.md)** (C, GPL-2.0, beta, inactive since 2004)
- **[Gem Drop X](../gem_drop_x.md)** (C, GPL-2.0, beta, inactive since 2002)
- **[ges-code](../ges-code.md)** (C, C++, GPL-3.0, mature)
- **[Ghostly](../ghostly.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[Gift Grabber](../gift_grabber.md)** (JavaScript, Apache-2.0, mature)
- **[Gigalomania](../gigalomania.md)** (C++, GPL-2.0, mature)
- **[Gilbert and the doors](../gilbert_and_the_doors.md)** (C, GPL-3.0, mature, inactive since 2018)
- **[gist-txt](../gist-txt.md)** (JavaScript, MIT, mature, inactive since 2018)
- **[GJID](../gjid.md)** (C++, MIT, mature, inactive since 2017)
- **[GL-117](../gl-117.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Glest](../glest.md)** (C++, GPL-2.0, mature, inactive since 2009)
- **[Globulation 2](../globulation_2.md)** (C++, GPL-3.0, mature)
- **[glParchis](../glparchis.md)** (Python, GPL-3.0, mature)
- **[glPortal](../glportal.md)** (C++, zlib, beta)
- **[GLtron](../gltron.md)** (C, ?, beta, inactive since 2017)
- **[Gnome Chess](../gnome_chess.md)** (Vala, GPL-3.0, mature)
- **[Gnome Hearts](../gnome_hearts.md)** (Python, GPL-2.0, mature, inactive since 2015)
- **[Gnomescroll](../gnomescroll.md)** (C, C++, Python, GPL-3.0, beta, inactive since 2013)
- **[GNU Chess](../gnu_chess.md)** (C++, GPL-3.0, mature, inactive since 2017)
- **[GNU FreeDink](../gnu_freedink.md)** (C, GPL-3.0, mature, inactive since 2012)
- **[GNU Go](../gnu_go.md)** (C, GPL-3.0, mature, inactive since 2011)
- **[Go Ollie!](../go_ollie.md)** (?, GPL-3.0, mature, inactive since 2011)
- **[Goblin Camp](../goblin_camp.md)** (C++, GPL-3.0, beta, inactive since 2012)
- **[Goblin Hack](../goblin_hack.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[GoldenEye: Source](../goldeneye_source.md)** (C++, C, GPL-3.0, mature, inactive since 2018)
- **[Golly](../golly.md)** (C++, Java, GPL-2.0, mature)
- **[Gorc](../gorc.md)** (C++, Apache-2.0, beta)
- **[Gorillas-rs](../gorillas-rs.md)** (Rust, MIT, beta)
- **[Gorillas](../gorillas.md)** (Objective-C, JavaScript, Java Research License, mature, inactive since 2014)
- **[GPL Arcade Volleyball](../gpl_arcade_volleyball.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[Grabble](../grabble.md)** (Java, ?, mature, inactive since 2006)
- **[Grail](../grail.md)** (C++, Lua, GPL-3.0, beta, inactive since 2013)
- **[Granatier](../granatier.md)** (C++, GPL-2.0, mature)
- **[Gravitation](../gravitation.md)** (C++, Public domain, mature, inactive since 2008)
- **[Greenius' Civil War](../greenius_civil_war.md)** (C++, GPL-2.0, beta, inactive since 2001)
- **[Greentwip's Harvest Moon](../greentwips_harvest_moon.md)** (C#, GPL-3.0, beta)
- **[Griefly](../griefly.md)** (C++, Go, Python, MIT, beta)
- **[Grimsonland](../grimsonland.md)** (JavaScript, MIT, mature, inactive since 2017)
- **[Grobots](../grobots.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[GUSANOS](../gusanos.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[Gusty's Serpents](../gustys_serpents.md)** (C++, GPL-3.0, beta, inactive since 2014)
- **[Gweled](../gweled.md)** (C, GPL-2.0, mature)
- **[GZDoom](../gzdoom.md)** (C, C++, GPL-3.0, mature)
- **[H-Craft Championship](../h-craft_championship.md)** (C++, zlib, mature, inactive since 2015)
- **[Hack](../hack.md)** (C, 3-clause BSD, mature, inactive since 1985)
- **[Hale](../hale.md)** (Java, GPL-2.0, beta, inactive since 2014)
- **[Hammer of Thyrion](../hammer_of_thyrion.md)** (C, GPL-2.0, mature)
- **[Hardwar](../hardwar.md)** (C++, GPL-3.0, beta, inactive since 2015)
- **[Harris](../harris.md)** (C, Python, GPL-3.0, beta)
- **[Haxima](../haxima.md)** (C++, GPL-3.0, beta)
- **[Head over Heels](../head_over_heels.md)** (C++, GPL-3.0, mature)
- **[Heart of the Alien](../heart_of_the_alien.md)** (C, GPL-2.0, beta, inactive since 2005)
- **[Hedgewars](../hedgewars.md)** (Lua, C, C++, Pascal, Haskell, GPL-2.0, mature)
- **[Help Hannah's Horse](../help_hannahs_horse.md)** (C++, GPL-2.0, beta, inactive since 2008)
- **[Hematite](../hematite.md)** (Rust, MIT, beta)
- **[Hero of Allacrost](../hero_of_allacrost.md)** (C++, Lua, GPL-2.0, mature)
- **[Heroes of Civilizations](../heroes_of_civilizations.md)** (C++, C#, GPL-2.0, beta)
- **[Heroes of Wesnoth](../heroes_of_wesnoth.md)** (C++, GPL-3.0, beta, inactive since 2010)
- **[Heroes of Wing Commander](../heroes_of_wing_commander.md)** (Python, GPL-3.0, beta, inactive since 2014)
- **[Hex Game](../hex_game.md)** (C++, MIT, beta)
- **[Hex-a-hop](../hex-a-hop.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[HexGL](../hexgl.md)** (JavaScript, CoffeeScript, MIT, mature, inactive since 2016)
- **[heXon](../hexon.md)** (C++, GPL-2.0, beta)
- **[Hexoshi](../hexoshi.md)** (Python, GPL-3.0, beta, inactive since 2016)
- **[Hextris](../hextris.md)** (JavaScript, GPL-3.0, mature)
- **[Hexwar](../hexwar.md)** (Ruby, JavaScript, MIT, beta, inactive since 2012)
- **[HHexen](../hhexen.md)** (C, GPL-2.0, mature, inactive since 2013)
- **[Hnefatafl](../hnefatafl.md)** (C, ISC, beta, inactive since 2014)
- **[Hocoslamfy](../hocoslamfy.md)** (C, C++, GPL-2.0, beta, inactive since 2016)
- **[HoDoKu](../hodoku.md)** (Java, GPL-3.0, mature, inactive since 2013)
- **[Holtz](../holtz.md)** (C++, GPL-2.0, mature)
- **[HolySpirit](../holyspirit.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[Hopson-Arcade](../hopson-arcade.md)** (C++, GPL-3.0, mature)
- **[HoverRace](../hoverrace.md)** (C++, Custom, mature, inactive since 2016)
- **[Hovertank3D](../hovertank3d.md)** (C++, Assembly, GPL-2.0, mature, inactive since 2014)
- **[HTML5 Pacman](../html5_pacman.md)** (JavaScript, WTFPL, mature, inactive since 2013)
- **[Hypatia](../hypatia.md)** (Python, MIT, beta, inactive since 2016)
- **[Hypercube](../hypercube.md)** (Java, GPL-2.0, mature, inactive since 2016)
- **[HyperRogue](../hyperrogue.md)** (C++, GPL-2.0, mature)
- **[I Have No Tomatoes](../i_have_no_tomatoes.md)** (C++, zlib, mature, inactive since 2004)
- **[ICBM3D](../icbm3d.md)** (C, ?, beta, inactive since 1998)
- **[Ice Breaker](../ice_breaker.md)** (C, GPL-2.0, mature, inactive since 2003)
- **[Iceball](../iceball.md)** (C, Lua, GPL-3.0, inactive since 2017)
- **[ika](../ika.md)** (C++, Python, PHP, C#, GPL-2.0, beta, inactive since 2007)
- **[Ilarion](../ilarion.md)** (C++, Java, Lua, GPL-3.0, mature)
- **[Imperium](../imperium.md)** (?, ?, mature)
- **[Inexor](../inexor.md)** (C++, JavaScript, zlib, beta, inactive since 2018)
- **[Infiniminer](../infiniminer.md)** (C#, MIT, mature, inactive since 2016)
- **[Infinite Tux](../infinite_tux.md)** (Java, GPL-3.0, Public domain, mature)
- **[Infon Battle Arena](../infon_battle_arena.md)** (C, Lua, GPL-2.0, beta, inactive since 2012)
- **[INSTEAD](../instead.md)** (C, Lua, MIT, mature)
- **[Intricacy](../intricacy.md)** (Haskell, GPL-3.0, beta)
- **[IO Reboot](../io_reboot.md)** (C#, MIT, mature, inactive since 2017)
- **[ioquake3](../ioquake3.md)** (C, GPL-2.0, mature)
- **[iortcw](../iortcw.md)** (C, C++, GPL-3.0, mature)
- **[Iris2](../iris2.md)** (C, C++, Lua, GPL-3.0, beta, inactive since 2017)
- **[Iron Seed](../iron_seed.md)** (Pascal, GPL-3.0, mature, inactive since 2013)
- **[irrlamb](../irrlamb.md)** (C, C++, GPL-3.0, mature)
- **[Isometric Turn-Based Strategy](../isometric_turn-based_strategy.md)** (Python, MIT, beta)
- **[Isometric-Minesweeper](../isometric-minesweeper.md)** (Python, MIT, beta)
- **[Iter Vehemens ad Necem](../iter_vehemens_ad_necem.md)** (C++, GPL-2.0, beta)
- **[Jagged Alliance 2 Stracciatella](../jagged_alliance_2_stracciatella.md)** (C, C++, Custom, mature)
- **[Jake2](../jake2.md)** (Java, GPL-2.0, beta, inactive since 2006)
- **[Jamp](../jamp.md)** (C++, GPL-3.0, beta, inactive since 2009)
- **[JavaScript Graphic Adventure Maker](../javascript_graphic_adventure_maker.md)** (JavaScript, MIT, mature)
- **[javascript-E.T.](../javascript-et.md)** (JavaScript, Assembly, MIT, beta, inactive since 2017)
- **[Javelin](../javelin.md)** (Java, GPL-2.0, mature, inactive since 2016)
- **[Jazz² Resurrection](../jazz_resurrection.md)** (C#, JavaScript, GPL-3.0, mature)
- **[jClassicRPG](../jclassicrpg.md)** (Java, LGPL-3.0, beta, inactive since 2010)
- **[JediAcademyLinux](../jediacademylinux.md)** (C++, GPL-2.0, beta, inactive since 2017)
- **[JediOutcastLinux](../jedioutcastlinux.md)** (C, C++, GPL-2.0, mature)
- **[Jet-Story](../jet-story.md)** (Assembly, C, C++, MIT, beta)
- **[jewelthief](../jewelthief.md)** (Java, GPL-3.0, mature, inactive since 2016)
- **[JFDuke3D](../jfduke3d.md)** (C, GPL-2.0, beta, inactive since 2005)
- **[JonoF's Shadow Warrior Port (JFSW)](../jonofs_shadow_warrior_port_jfsw.md)** (C, GPL-2.0, beta, inactive since 2005)
- **[JQuest](../jquest.md)** (Java, GPL-2.0, beta, inactive since 2006)
- **[JSettlers](../jsettlers.md)** (Java, GPL-3.0, mature)
- **[jsFO](../jsfo.md)** (JavaScript, Python, Apache-2.0, beta, inactive since 2017)
- **[JSkat](../jskat.md)** (Java, GPL-3.0, Apache-2.0, beta)
- **[JSoko](../jsoko.md)** (Java, GPL-3.0, mature)
- **[Julius](../julius.md)** (C, C++, AGPL-3.0, mature)
- **[Jump'n'Bump](../jumpnbump.md)** (C, GPL-2.0, mature, inactive since 2004)
- **[Just another Tetris™ clone](../just_another_tetris_clone.md)** (Java, WTFPL, mature, inactive since 2017)
- **[KaM Remake](../kam_remake.md)** (Pascal, AGPL-3.0, mature)
- **[Kartering](../kartering.md)** (C, GPL-2.0, MIT, ISC, beta, inactive since 2015)
- **[KAtomic](../katomic.md)** (C++, GPL-2.0, mature)
- **[Keen Dreams](../keen_dreams.md)** (C, Assembly, C++, GPL-2.0, mature, inactive since 2014)
- **[KeeperRL](../keeperrl.md)** (C, C++, GPL-2.0, beta)
- **[Key Runner](../key_runner.md)** (C++, GPL-3.0, mature, inactive since 2013)
- **[KGoldrunner](../kgoldrunner.md)** (C++, GPL-2.0, mature)
- **[kiki the nano bot](../kiki_the_nano_bot.md)** (C++, Public domain, mature, inactive since 2007)
- **[Killer Crates](../killer_crates.md)** (Java, MIT, beta, inactive since 2017)
- **[Kingdoms](../kingdoms.md)** (C++, GPL-3.0, beta, inactive since 2014)
- **[KittenMaxit](../kittenmaxit.md)** (Java, MIT, beta)
- **[KKnD](../kknd.md)** (C#, GPL-3.0, beta)
- **[Klooni 1010!](../klooni_1010.md)** (Java, GPL-3.0, beta)
- **[KMines](../kmines.md)** (C++, GPL-2.0, mature)
- **[KnightOfWor](../knightofwor.md)** (Java, GPL-3.0, beta, inactive since 2015)
- **[Knights](../knights.md)** (C++, GPL-3.0, beta, inactive since 2014)
- **[Kobo Deluxe](../kobo_deluxe.md)** (C++, GPL-2.0, beta, inactive since 2007)
- **[Kobold's Quest 2](../kobolds_quest_2.md)** (Python, LGPL-3.0, beta, inactive since 2011)
- **[Korax' Heritage](../korax_heritage.md)** (None, ?, mature)
- **[KQ Lives](../kq_lives.md)** (C, GPL-2.0, beta, inactive since 2011)
- **[Krank](../krank.md)** (Python, Public domain, beta, inactive since 2008)
- **[Krystal Drop](../krystal_drop.md)** (C++, GPL-2.0, beta, inactive since 2004)
- **[KSnakeDuel](../ksnakeduel.md)** (C++, GPL-2.0, mature)
- **[Ksudoku](../ksudoku.md)** (C++, GPL-2.0, mature)
- **[Kuklomenos](../kuklomenos.md)** (C++, GPL-3.0, beta, inactive since 2012)
- **[L'Abbaye des Morts](../labbaye_des_morts.md)** (C, GPL-3.0, mature, inactive since 2018)
- **[l-echo](../l-echo.md)** (C++, GPL-3.0, beta, inactive since 2016)
- **[Labyrinth of Worlds](../labyrinth_of_worlds.md)** (C++, LGPL-3.0, beta, inactive since 2010)
- **[ladder](../ladder-2.md)** (Go, MIT, beta, inactive since 2016)
- **[Ladder](../ladder.md)** (Java, GPL-2.0, mature, inactive since 2005)
- **[LambdaHack](../lambdahack.md)** (Haskell, 3-clause BSD, beta)
- **[LambdaRogue: The Book of Stars](../lambdarogue_the_book_of_stars.md)** (Pascal, GPL-2.0, mature, inactive since 2012)
- **[Land of Fire](../land_of_fire.md)** (Script, GPL-2.0, beta)
- **[LastTry](../lasttry.md)** (Java, MIT, beta, inactive since 2017)
- **[LBreakout2](../lbreakout2.md)** (C, GPL-2.0, mature, inactive since 2010)
- **[LBreakoutHD](../lbreakouthd.md)** (C++, GPL-3.0, mature)
- **[Lemmings.ts](../lemmingsts.md)** (TypeScript, MIT, mature)
- **[Lemmini](../lemmini.md)** (Java, Apache-2.0, beta, inactive since 2017)
- **[LevelHead](../levelhead.md)** (C++, Python, GPL-3.0, mature, inactive since 2009)
- **[Lexica](../lexica.md)** (Java, GPL-3.0, mature)
- **[LGames](../lgames.md)** (C++, GPL-2.0, mature)
- **[LGeneral](../lgeneral.md)** (C, GPL-2.0, mature, inactive since 2017)
- **[Liberal Crime Squad](../liberal_crime_squad.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[Liberation Circuit](../liberation_circuit.md)** (C, GPL-3.0, mature)
- **[Libre Pinball](../libre_pinball.md)** (GDScript, MIT, beta, inactive since 2015)
- **[Librelancer](../librelancer.md)** (C, C#, MIT, beta)
- **[Librerama](../librerama.md)** (GDScript, GPL-3.0, mature)
- **[Limbs Off](../limbs_off.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[LinCity-NG](../lincity-ng.md)** (C++, GPL-2.0, mature)
- **[Lincity](../lincity.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[Linley's Dungeon Crawl](../linleys_dungeon_crawl.md)** (C, Custom, mature, inactive since 2006)
- **[Linwarrior 3D](../linwarrior_3d.md)** (C++, Apache-2.0, mature, inactive since 2010)
- **[LionEngine](../lionengine.md)** (Java, GPL-3.0, mature)
- **[Lionheart Remake](../lionheart_remake.md)** (Java, GPL-3.0, beta, inactive since 2018)
- **[Lips of Suna](../lips_of_suna.md)** (C, GPL-3.0, beta, inactive since 2014)
- **[Liquid War](../liquid_war.md)** (C, GPL-3.0, mature, inactive since 2015)
- **[Lix](../lix.md)** (D, C++, CC0, beta)
- **[LMarbles](../lmarbles.md)** (C, GPL-2.0, beta)
- **[Lords of the Fey](../lords_of_the_fey.md)** (JavaScript, AGPL-3.0, beta, inactive since 2018)
- **[LordsAWar!](../lordsawar.md)** (C++, GPL-3.0, mature)
- **[Lose Your Marbles](../lose_your_marbles.md)** (JavaScript, MIT, mature, inactive since 2014)
- **[LTris](../ltris.md)** (C, GPL-2.0, mature, inactive since 2013)
- **[lttp-phaser](../lttp-phaser.md)** (TypeScript, JavaScript, MIT, beta, inactive since 2016)
- **[Lugaru](../lugaru.md)** (C++, GPL-2.0, mature)
- **[Luola](../luola.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[M.A.R.S.](../mars.md)** (C++, C, GPL-3.0, beta, inactive since 2016)
- **[M.E.W.L.](../mewl.md)** (C++, GPL-2.0, beta, inactive since 2015)
- **[Machinations](../machinations.md)** (C++, GPL-2.0, beta, inactive since 2003)
- **[Maelstrom](../maelstrom.md)** (C, C++, GPL-2.0, mature, inactive since 2002)
- **[Magarena](../magarena.md)** (Java, Groovy, GPL-3.0, mature)
- **[MAGE - Matthias Advanced Game Engine](../mage-matthias_advanced_game_engine.md)** (C++, GPL-3.0, beta)
- **[Magic Gardeners Tournament](../magic_gardeners_tournament.md)** (Python, GPL-2.0, beta, inactive since 2007)
- **[Magical Life](../magical_life.md)** (C#, MIT, beta)
- **[Mah-Jong](../mah-jong.md)** (C, GPL-2.0, mature)
- **[Manic Digger](../manic_digger.md)** (C#, Public domain, Unlicense, mature, inactive since 2017)
- **[Marble Marcher](../marble_marcher.md)** (C++, GPL-2.0, mature)
- **[Marblez](../marblez.md)** (C#, MIT, beta, inactive since 2017)
- **[Mari0](../mari0.md)** (Lua, MIT, mature, inactive since 2012)
- **[Mario Objects](../mario_objects.md)** (C#, MIT, beta)
- **[Mars, Land of No Mercy](../mars_land_of_no_mercy.md)** (C++, GPL-2.0, beta, inactive since 2008)
- **[Maxit](../maxit.md)** (C++, 3-clause BSD, mature, inactive since 2014)
- **[Me and My Shadow](../me_and_my_shadow.md)** (C++, GPL-3.0, beta)
- **[Mechanized Assault & eXploration Reloaded](../mechanized_assault_exploration_reloaded.md)** (C++, C, GPL-2.0, beta)
- **[MechCommander 2 Omnitech](../mechcommander_2_omnitech.md)** (C++, MS-PL, beta, inactive since 2013)
- **[Mega Mario](../mega_mario.md)** (C++, LGPL-2.1, mature, inactive since 2012)
- **[MegaGlest](../megaglest.md)** (C, C++, GPL-3.0, mature)
- **[MegaMek](../megamek.md)** (Java, GPL-2.0, mature)
- **[melonJS](../melonjs.md)** (JavaScript, MIT, mature)
- **[Memory Game](../memory_game.md)** (Java, Apache-2.0, mature)
- **[Mercenary Commander](../mercenary_commander.md)** (Java, 3-clause BSD, beta, inactive since 2010)
- **[Meridian 59](../meridian_59.md)** (C++, C, GPL-2.0, mature)
- **[Meritous](../meritous.md)** (C, GPL-3.0, mature, inactive since 2008)
- **[Metal Mech](../metal_mech.md)** (PHP, GPL-2.0, beta, inactive since 2006)
- **[Mice Men: Remix](../mice_men_remix.md)** (Java, LGPL-3.0, mature, inactive since 2016)
- **[Micropolis](../micropolis.md)** (C++, Java, Python, GPL-3.0, mature, inactive since 2015)
- **[micropolisJS](../micropolisjs.md)** (JavaScript, GPL-3.0, mature)
- **[Microracers](../microracers.md)** (C, C++, GPL-2.0, beta, inactive since 2005)
- **[MicroWar 2.0](../microwar_20.md)** (Python, 3-clause BSD, mature, inactive since 2009)
- **[Mindustry](../mindustry.md)** (Java, GPL-3.0, mature)
- **[MineCraft-One-Week-Challenge](../minecraft-one-week-challenge.md)** (C++, MIT, beta)
- **[minecraft-weekend](../minecraft-weekend.md)** (C, MIT, beta)
- **[Mines](../mines.md)** (Vala, GPL-3.0, mature)
- **[Minesweeper (in C)](../minesweeper_in_c.md)** (C, 3-clause BSD, beta, inactive since 2015)
- **[Minesweeper.Zone](../minesweeperzone.md)** (JavaScript, PHP, MIT, mature)
- **[Minetest Game](../minetest_game.md)** (Lua, LGPL-2.1, mature)
- **[mini2Dx](../mini2dx.md)** (Java, C#, Apache-2.0, mature)
- **[Minilens](../minilens.md)** (GDScript, GPL-3.0, mature, inactive since 2018)
- **[Minima](../minima.md)** (Lua, GPL-3.0, mature)
- **[Mininim](../mininim.md)** (C, GPL-3.0, beta, inactive since 2017)
- **[MiniPacman](../minipacman.md)** (Ada, GPL-3.0, mature)
- **[Mirror Magic](../mirror_magic.md)** (C, GPL-2.0, mature)
- **[mk.js](../mkjs.md)** (JavaScript, MIT, beta)
- **[Mmpong](../mmpong.md)** (C, GPL-3.0, beta, inactive since 2009)
- **[Moagg2](../moagg2.md)** (Java, GPL-2.0, mature, inactive since 2008)
- **[Mocha Doom](../mocha_doom.md)** (Java, ?, beta, inactive since 2012)
- **[Monsters and Mushrooms](../monsters_and_mushrooms.md)** (Python, GPL-2.0, mature, inactive since 2010)
- **[Monstrosity](../monstrosity.md)** (Python, MIT, mature)
- **[Moon-buggy](../moon-buggy.md)** (C, GPL-2.0, mature, inactive since 2006)
- **[Moonbase Assault](../moonbase_assault.md)** (Java, MIT, beta, inactive since 2019)
- **[Moria](../moria.md)** (C, GPL-3.0, mature)
- **[Morpheus Web Remake](../morpheus_web_remake.md)** (JavaScript, MIT, beta)
- **[movbizz](../movbizz.md)** (PHP, JavaScript, MIT, beta, inactive since 2015)
- **[Mpango](../mpango.md)** (Java, GPL-2.0, beta, inactive since 2013)
- **[Mr. Rescue](../mr_rescue.md)** (Lua, zlib, mature, inactive since 2016)
- **[Mr.Boom](../mrboom.md)** (C++, MIT, mature)
- **[Mrfuze](../mrfuze.md)** (Python, LGPL-2.1, mature, inactive since 2008)
- **[Mtp Target](../mtp_target.md)** (C++, GPL-2.0, mature, inactive since 2008)
- **[Murder In The Public Domain](../murder_in_the_public_domain.md)** (C++, GPL-3.0, mature, inactive since 2013)
- **[MUSoSu](../musosu.md)** (Java, GPL-3.0, beta, inactive since 2008)
- **[n2048](../n2048.md)** (C, 2-clause BSD, beta, inactive since 2014)
- **[Naev](../naev.md)** (C, Lua, GPL-3.0, mature)
- **[NBlood](../nblood.md)** (C, C++, Lua, GPL-2.0, mature)
- **[Netacka](../netacka.md)** (C, MIT, mature)
- **[NetHack](../nethack.md)** (C, Custom, mature)
- **[NetMauMau](../netmaumau.md)** (C++, LGPL-3.0, mature, inactive since 2015)
- **[NetPanzer](../netpanzer.md)** (C++, GPL-2.0, beta)
- **[Netrek](../netrek.md)** (C, Custom, mature, inactive since 2009)
- **[NetStatsBaseball](../netstatsbaseball.md)** (C, Public domain, mature)
- **[Neverball](../neverball.md)** (C, C++, GPL-2.0, mature)
- **[Nexuiz](../nexuiz.md)** (C++, GPL-2.0, mature)
- **[NFSIISE](../nfsiise.md)** (C, MIT, mature)
- **[Nighthawk](../nighthawk.md)** (C++, GPL-2.0, mature, inactive since 2004)
- **[Nikki and the Robots](../nikki_and_the_robots.md)** (Haskell, LGPL-3.0, mature, inactive since 2012)
- **[Nikwi](../nikwi.md)** (C++, GPL-2.0, beta, inactive since 2012)
- **[NLarn](../nlarn.md)** (C, Lua, GPL-3.0, mature)
- **[Noiz2sa](../noiz2sa.md)** (C, C++, 2-clause BSD, beta, inactive since 2004)
- **[Not Pacman](../not_pacman.md)** (Lua, WTFPL, mature, inactive since 2013)
- **[NOVA PINBALL](../nova_pinball.md)** (Lua, GPL-3.0, beta, inactive since 2017)
- **[Nox Imperii](../nox_imperii.md)** (C, GPL-3.0, mature, inactive since 2016)
- **[NStars!](../nstars.md)** (C#, ?, beta, inactive since 2004)
- **[NullpoMino](../nullpomino.md)** (Java, 3-clause BSD, mature)
- **[Numpty Physics](../numpty_physics.md)** (C++, GPL-3.0, beta, inactive since 2016)
- **[Nuncabola](../nuncabola.md)** (Java, GPL-2.0, beta)
- **[Nuvie](../nuvie.md)** (C, C++, Lua, GPL-2.0, beta, inactive since 2018)
- **[NXEngine-evo](../nxengine-evo.md)** (C++, GPL-3.0, mature)
- **[NXEngine](../nxengine.md)** (C, C++, GPL-3.0, mature)
- **[nXtank](../nxtank.md)** (Python, GPL-3.0, beta, inactive since 2010)
- **[Odamex](../odamex.md)** (C, C++, GPL-2.0, beta)
- **[OGS Mahjong](../ogs_mahjong.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[OldSkool Gravity Game](../oldskool_gravity_game.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[Omega](../omega.md)** (JavaScript, Ruby, AGPL-3.0, beta)
- **[Omnispeak](../omnispeak.md)** (C, GPL-2.0, mature)
- **[One Hour One Life](../one_hour_one_life.md)** (C, C++, PHP, Public domain, mature)
- **[One is enough](../one_is_enough.md)** (Python, GPL-2.0, beta, inactive since 2008)
- **[One Way To Go](../one_way_to_go.md)** (Lua, GPL-3.0, mature, inactive since 2011)
- **[Online Chess Club](../online_chess_club.md)** (PHP, JavaScript, GPL-2.0, mature)
- **[Oolite](../oolite.md)** (Objective-C, C, JavaScript, GPL-2.0, mature)
- **[Open Apocalypse](../open_apocalypse.md)** (C++, MIT, beta)
- **[Open Cube](../open_cube.md)** (C++, zlib, beta, inactive since 2017)
- **[Open Flood](../open_flood.md)** (Java, MIT, mature, inactive since 2018)
- **[Open Fodder](../open_fodder.md)** (C, C++, GPL-3.0, mature)
- **[Open Fortress](../open_fortress.md)** (C++, CC-BY-NC-SA-4.0, Custom, beta)
- **[Open Hexagon](../open_hexagon.md)** (C++, AFL-3.0, mature)
- **[Open Horizon](../open_horizon.md)** (C++, MIT, beta)
- **[Open Imperium Galactica](../open_imperium_galactica.md)** (Java, LGPL-3.0, mature)
- **[Open Jumpgate](../open_jumpgate.md)** (C++, GPL-2.0, beta, inactive since 2017)
- **[Open Legend RPG](../open_legend_rpg.md)** (None, Custom, mature)
- **[Open Meridian](../open_meridian.md)** (C, C++, GPL-2.0, mature)
- **[Open Panzer](../open_panzer.md)** (JavaScript, GPL-2.0, mature)
- **[Open Quartz](../open_quartz.md)** (C, GPL-2.0, beta, inactive since 2004)
- **[Open Rails](../open_rails.md)** (C#, GPL-3.0, mature)
- **[Open Rodent's Revenge](../open_rodents_revenge.md)** (C++, MIT, beta, inactive since 2018)
- **[Open RSC](../open_rsc.md)** (Java, GPL-3.0, mature)
- **[Open Simulator](../open_simulator.md)** (C#, ?, beta)
- **[Open Soccer Star](../open_soccer_star.md)** (PHP, GPL-3.0, beta)
- **[Open Surge](../open_surge.md)** (C, GPL-3.0, beta)
- **[Open Syobon Action](../open_syobon_action.md)** (C++, ?, beta, inactive since 2011)
- **[Open Tibia](../open_tibia.md)** (C++, GPL-2.0, beta, inactive since 2014)
- **[Open Yahtzee](../open_yahtzee.md)** (C++, GPL-2.0, mature, inactive since 2016)
- **[Open Zelda](../open_zelda.md)** (C, C++, zlib, mature, inactive since 2015)
- **[openage](../openage.md)** (C++, Python, GPL-3.0, beta)
- **[OpenAlchemist](../openalchemist.md)** (C++, GPL-2.0, beta, inactive since 2010)
- **[OpenArena](../openarena.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[openblack](../openblack.md)** (C, C++, GPL-3.0, beta)
- **[OpenBlok](../openblok.md)** (C++, GPL-3.0, beta)
- **[OpenBlox](../openblox.md)** (Python, Lua, GPL-3.0, beta, inactive since 2011)
- **[OpenBOR](../openbor.md)** (C, C++, 3-clause BSD, mature)
- **[OpenBVE](../openbve.md)** (C#, Public domain, mature)
- **[OpenC1](../openc1.md)** (C#, ?, beta, inactive since 2014)
- **[openc2e](../openc2e.md)** (C, C++, LGPL-2.1, beta)
- **[OpenCity](../opencity.md)** (C++, GPL-2.0, beta, inactive since 2015)
- **[OpenClaw](../openclaw.md)** (C++, GPL-3.0, mature)
- **[OpenClonk](../openclonk.md)** (C, C++, ISC, mature)
- **[OpenCrystalCaves](../opencrystalcaves.md)** (C++, MIT, beta, inactive since 2017)
- **[OpenDominion](../opendominion.md)** (PHP, AGPL-3.0, beta)
- **[openDOW](../opendow.md)** (C, GPL-3.0, beta)
- **[OpenDUNE](../opendune.md)** (C, GPL-2.0, mature)
- **[OpenDungeons](../opendungeons.md)** (C++, GPL-3.0, beta)
- **[OpenEtG](../openetg.md)** (JavaScript, MIT, beta)
- **[OpenFire](../openfire.md)** (C, MIT, beta, inactive since 2018)
- **[OpenFNaF](../openfnaf.md)** (C, MIT, beta)
- **[OpenGGS](../openggs.md)** (C++, GPL-2.0, beta, inactive since 2017)
- **[OpenGL Test Drive Remake](../opengl_test_drive_remake.md)** (C, C++, GPL-3.0, mature, inactive since 2015)
- **[Openglad](../openglad.md)** (C++, GPL-2.0, mature, inactive since 2004)
- **[OpenGothic](../opengothic.md)** (C++, MIT, beta)
- **[OpenHoMM](../openhomm.md)** (C++, GPL-3.0, beta, inactive since 2010)
- **[OpenHoW](../openhow.md)** (C, C++, GPL-3.0, beta)
- **[OpenITG](../openitg.md)** (C, C++, MIT, beta, inactive since 2017)
- **[OpenJazz](../openjazz.md)** (C++, GPL-2.0, beta)
- **[OpenJK](../openjk.md)** (C, C++, GPL-2.0, beta)
- **[OpenKeeper](../openkeeper.md)** (Java, GPL-3.0, beta)
- **[OpenLara](../openlara.md)** (C++, 2-clause BSD, mature)
- **[OpenLiero](../openliero.md)** (C++, Custom, mature, inactive since 2015)
- **[OpenLieroX](../openlierox.md)** (C++, LGPL-2.0, mature)
- **[OpenLoco](../openloco.md)** (C++, MIT, mature)
- **[OpenMC2](../openmc2.md)** (C++, GPL-3.0, beta, inactive since 2018)
- **[OpenMoM](../openmom.md)** (C, C++, GPL-3.0, beta)
- **[OpenMOO2](../openmoo2.md)** (Python, GPL-2.0, beta, inactive since 2011)
- **[OpenMortal](../openmortal.md)** (C++, Perl, GPL-2.0, beta, inactive since 2006)
- **[openMSX](../openmsx.md)** (C++, GPL-2.0, mature)
- **[OpenMW for Android](../openmw_for_android.md)** (Kotlin, GPL-3.0, mature)
- **[OpenMW](../openmw.md)** (C++, GPL-3.0, mature)
- **[OpenNFS](../opennfs.md)** (C, C++, MIT, beta)
- **[OpenNotrium](../opennotrium.md)** (C++, GPL-3.0, beta)
- **[OpenOMF](../openomf.md)** (C, C++, MIT, beta)
- **[OpenRA](../openra.md)** (C#, GPL-3.0, mature)
- **[OpenRaider](../openraider.md)** (C, C++, GPL-2.0, beta, inactive since 2015)
- **[OpenRCT2](../openrct2.md)** (C++, GPL-3.0, mature)
- **[OpenRoads](../openroads.md)** (TypeScript, JavaScript, MIT, mature, inactive since 2014)
- **[OpenRTS](../openrts.md)** (Python, GPL-2.0, beta, inactive since 2006)
- **[OpenRW](../openrw.md)** (C, C++, GPL-3.0, beta)
- **[OpenSAGE](../opensage.md)** (C#, LGPL-3.0, beta)
- **[OpenSC2K](../opensc2k.md)** (JavaScript, GPL-3.0, beta)
- **[OpenSkyscraper](../openskyscraper.md)** (C++, GPL-2.0, beta)
- **[OpenSoccer](../opensoccer.md)** (PHP, GPL-3.0, beta)
- **[OpenSolomonsKey](../opensolomonskey.md)** (C++, Unlicense, beta)
- **[OpenSpades](../openspades.md)** (C, C++, AngelScript, GPL-3.0, beta)
- **[OpenSR](../opensr.md)** (C++, GPL-3.0, beta, inactive since 2017)
- **[OpenSupaplex](../opensupaplex.md)** (C, GPL-3.0, mature)
- **[OpenSWE1R](../openswe1r.md)** (C, C++, GPL-2.0, beta)
- **[OpenTESArena](../opentesarena.md)** (C++, MIT, beta)
- **[OpenTitus](../opentitus.md)** (C, GPL-3.0, beta, inactive since 2014)
- **[OpenTomb](../opentomb.md)** (C, C++, Lua, LGPL-3.0, beta)
- **[OpenTriad](../opentriad.md)** (Java, GPL-3.0, beta, inactive since 2017)
- **[OpenTTD](../openttd.md)** (C++, GPL-2.0, mature)
- **[OpenTyrian](../opentyrian.md)** (C, GPL-2.0, beta, inactive since 2018)
- **[OpenVIII](../openviii.md)** (C#, MIT, beta)
- **[OpenWebSoccer-Sim](../openwebsoccer-sim.md)** (PHP, LGPL-3.0, mature)
- **[OpenXcom](../openxcom.md)** (C++, GPL-3.0, mature)
- **[OpenYandere](../openyandere.md)** (C#, GPL-3.0, beta, inactive since 2018)
- **[Operation Citadel](../operation_citadel.md)** (C++, GPL-2.0, beta, inactive since 2000)
- **[OPMon](../opmon.md)** (C++, GPL-3.0, beta)
- **[Orbit-Hopper](../orbit-hopper.md)** (C++, GPL-2.0, mature, inactive since 2019)
- **[Orbium](../orbium.md)** (JavaScript, GPL-2.0, mature, inactive since 2018)
- **[ORIENT](../orient.md)** (C#, Java, GPL-2.0, mature, inactive since 2009)
- **[orona](../orona.md)** (CoffeeScript, GPL-2.0, beta, inactive since 2012)
- **[Ostrich Riders](../ostrich_riders.md)** (C++, GPL-3.0, beta)
- **[osu!](../osu.md)** (C#, MIT, beta)
- **[Other-Life](../other-life.md)** (C, C++, Custom, beta)
- **[Our Personal Space](../our_personal_space.md)** (Ren'Py, GPL-3.0, mature)
- **[Outer Space](../outer_space.md)** (Python, GPL-2.0, beta)
- **[Outpost HD](../outpost_hd.md)** (C++, 3-clause BSD, beta)
- **[ouzel](../ouzel.md)** (C, C++, Objective-C, 2-clause BSD, beta)
- **[Overgod](../overgod.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[Pac Go](../pac_go.md)** (Go, MIT, mature)
- **[Pacewar](../pacewar.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Pachi](../pachi.md)** (C, Python, GPL-2.0, mature)
- **[pacman-canvas](../pacman-canvas.md)** (JavaScript, CC-BY-SA-4.0, mature, inactive since 2018)
- **[Pacman](../pacman.md)** (C++, GPL-2.0, beta)
- **[PainTown](../paintown.md)** (C++, Java, Python, 3-clause BSD, mature)
- **[Palapeli](../palapeli.md)** (C++, GPL-2.0, mature)
- **[Panel Attack](../panel_attack.md)** (Lua, zlib, beta)
- **[Pang Zero](../pang_zero.md)** (Perl, GPL-2.0, beta, inactive since 2007)
- **[Paper Isaac](../paper_isaac.md)** (ooc, MIT, beta, inactive since 2015)
- **[PARPG](../parpg.md)** (Python, GPL-3.0, beta, inactive since 2012)
- **[PARSEC47](../parsec47.md)** (D, 2-clause BSD, beta, inactive since 2003)
- **[Pasang Emas](../pasang_emas.md)** (Vala, GPL-3.0, mature)
- **[Passage](../passage.md)** (C++, Public domain, mature, inactive since 2011)
- **[Pathogen Warrior](../pathogen_warrior.md)** (C++, GPL-2.0, beta, inactive since 2004)
- **[Pathological](../pathological.md)** (Python, GPL-2.0, beta, inactive since 2003)
- **[Pax Britannica](../pax_britannica.md)** (Lua, C, MIT, mature)
- **[PCExhumed](../pcexhumed.md)** (C++, Custom, beta)
- **[Penguin Command](../penguin_command.md)** (C, GPL-2.0, mature, inactive since 2007)
- **[Pentagram](../pentagram.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Pentobi](../pentobi.md)** (C++, GPL-3.0, mature)
- **[Peragro Tempus](../peragro_tempus.md)** (C, C++, GPL-2.0, beta, inactive since 2012)
- **[Performous](../performous.md)** (C, C++, GPL-2.0, mature)
- **[Phantasy Star Rebirth](../phantasy_star_rebirth.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[phpRPG](../phprpg.md)** (PHP, GPL-2.0, beta, inactive since 2006)
- **[Physics Platformer](../physics_platformer.md)** (Java, MIT, beta, inactive since 2019)
- **[Physics Spacewar](../physics_spacewar.md)** (Java, MIT, beta, inactive since 2019)
- **[Pillows](../pillows.md)** (Python, GPL-2.0, beta, inactive since 2007)
- **[Pingus](../pingus.md)** (C++, GPL-3.0, mature)
- **[Pink Pony](../pink_pony.md)** (C++, GPL-3.0, mature, inactive since 2017)
- **[Pioneer](../pioneer.md)** (C, C++, Lua, Apache-2.0, GPL-3.0, mature)
- **[Pioneers](../pioneers.md)** (C, GPL-2.0, mature)
- **[Pixel Wheels](../pixel_wheels.md)** (Java, GPL-3.0, beta)
- **[PixelLight](../pixellight.md)** (C, C++, MIT, mature, inactive since 2012)
- **[Pizza Business](../pizza_business.md)** (C++, GPL-2.0, mature, inactive since 2003)
- **[PlaneShift](../planeshift.md)** (C++, GPL-2.0, mature)
- **[Planetary Hoppers](../planetary_hoppers.md)** (Java, GPL-2.0, beta, inactive since 2003)
- **[Plee the Bear](../plee_the_bear.md)** (Lisp, C++, Scheme, C, GPL-3.0, beta, inactive since 2017)
- **[PokerTH](../pokerth.md)** (C++, AGPL-3.0, mature, inactive since 2017)
- **[Polis](../polis.md)** (Java, GPL-3.0, mature, inactive since 2016)
- **[POSTAL 1 Open Source](../postal_1_open_source.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Powermanga](../powermanga.md)** (C, GPL-3.0, beta, inactive since 2015)
- **[Powerslave EX](../powerslave_ex.md)** (C, C++, GPL-3.0, beta, inactive since 2017)
- **[PowerslaveGDX](../powerslavegdx.md)** (Java, Custom, beta)
- **[Powerslide remake](../powerslide_remake.md)** (C++, MIT, beta)
- **[pq2](../pq2.md)** (C++, GPL-3.0, mature)
- **[PrBoom+](../prboom+.md)** (C, GPL-2.0, mature, inactive since 2016)
- **[Prescription Wars](../prescription_wars.md)** (ColdFusion, JavaScript, GPL-3.0, mature, inactive since 2016)
- **[PrimeShooter](../primeshooter.md)** (JavaScript, GPL-2.0, mature, inactive since 2010)
- **[Primrose](../primrose.md)** (C++, Public domain, mature, inactive since 2009)
- **[Prince-Monogame](../prince-monogame.md)** (C#, GPL-2.0, beta)
- **[Privateer - Gemini Gold](../privateer-gemini_gold.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[progress-quest](../progress-quest.md)** (C++, MIT, mature)
- **[Project Alexandria](../project_alexandria.md)** (Python, ?, beta, inactive since 2007)
- **[Project Carrot](../project_carrot.md)** (C++, MIT, beta, inactive since 2017)
- **[Project Dollhouse](../project_dollhouse.md)** (C#, MPL-2.0, beta)
- **[Project Helena](../project_helena.md)** (Pascal, GPL-3.0, beta)
- **[Project: Starfighter](../project_starfighter.md)** (C, GPL-3.0, mature)
- **[ProQuake 4](../proquake_4.md)** (C, GPL-2.0, mature, inactive since 2018)
- **[proxx](../proxx.md)** (TypeScript, JavaScript, Apache-2.0, mature)
- **[PSY PONG 3D](../psy_pong_3d.md)** (C, GPL-3.0, beta, inactive since 2009)
- **[Pushover](../pushover.md)** (C++, C, Lua, GPL-3.0, beta, inactive since 2018)
- **[PyBreak360](../pybreak360.md)** (Python, GPL-3.0, mature, inactive since 2015)
- **[PyChess](../pychess.md)** (Python, GPL-3.0, mature)
- **[pycraft](../pycraft.md)** (C, Python, GPL-2.0, mature, inactive since 2018)
- **[Pygame---Alien-Invasion](../pygame-alien-invasion.md)** (Python, GPL-3.0, beta, inactive since 2018)
- **[PyKaraoke](../pykaraoke.md)** (Python, LGPL-2.1, beta, inactive since 2011)
- **[pyskool](../pyskool.md)** (Python, GPL-3.0, mature)
- **[PySol](../pysol.md)** (Python, GPL-2.0, mature, inactive since 2004)
- **[Python Kye](../python_kye.md)** (Python, GPL-2.0, mature, inactive since 2010)
- **[Q-Gears](../q-gears.md)** (C, C++, GPL-2.0, beta, inactive since 2015)
- **[Q](../q.md)** (Python, GPL-3.0, mature, inactive since 2013)
- **[Qonk](../qonk.md)** (C++, GPL-2.0, beta, inactive since 2008)
- **[Quadrapassel](../quadrapassel.md)** (Vala, GPL-2.0, mature)
- **[Quake3e](../quake3e.md)** (C, GPL-2.0, beta)
- **[QuakeJS](../quakejs.md)** (JavaScript, MIT, mature)
- **[QuakeSpasm](../quakespasm.md)** (C, GPL-2.0, mature)
- **[Quartz Engine](../quartz_engine.md)** (C++, 3-clause BSD, beta)
- **[Quatter](../quatter.md)** (C++, GPL-2.0, mature, inactive since 2018)
- **[Rabbit Escape](../rabbit_escape.md)** (Java, GPL-2.0, mature)
- **[Race Into Space](../race_into_space.md)** (C, C++, GPL-2.0, mature)
- **[RacerJS](../racerjs.md)** (JavaScript, MIT, mature, inactive since 2010)
- **[Radakan](../radakan.md)** (Python, Custom, beta, inactive since 2014)
- **[Rails: an 18xx game system](../rails_an_18xx_game_system.md)** (Java, GPL-2.0, mature)
- **[Raincat](../raincat.md)** (Haskell, 3-clause BSD, mature, inactive since 2018)
- **[ransack](../ransack.md)** (Python, MIT, mature, inactive since 2016)
- **[RBDOOM-3-BFG](../rbdoom-3-bfg.md)** (C, C++, GPL-3.0, mature)
- **[Reconstruction of Super ZZT](../reconstruction_of_super_zzt.md)** (Pascal, MIT, mature)
- **[Reconstruction of ZZT](../reconstruction_of_zzt.md)** (Pascal, MIT, mature)
- **[Red Eclipse](../red_eclipse.md)** (C++, zlib, mature)
- **[RedneckGDX](../redneckgdx.md)** (Java, Custom, beta)
- **[Rednukem](../rednukem.md)** (C++, Custom, beta)
- **[REDriver2](../redriver2.md)** (C++, MIT, beta)
- **[RedShift](../redshift.md)** (C, C++, GPL-2.0, beta, inactive since 2008)
- **[Reflection Keen](../reflection_keen.md)** (C, Lua, GPL-2.0, mature)
- **[REGoth](../regoth.md)** (C++, GPL-3.0, MIT, mature)
- **[Reliquarium](../reliquarium.md)** (Ada, GPL-2.0, mature)
- **[Remixed Dungeon](../remixed_dungeon.md)** (Java, GPL-3.0, mature)
- **[ReQbert](../reqbert.md)** (JavaScript, GPL-3.0, beta)
- **[Rescue! Max](../rescue_max.md)** (Java, GPL-3.0, beta, inactive since 2013)
- **[ResidualVM](../residualvm.md)** (C++, GPL-2.0, beta)
- **[Return of Dr. Destructo](../return_of_dr_destructo.md)** (C++, MIT, mature, inactive since 2015)
- **[Return to the Roots](../return_to_the_roots.md)** (C++, GPL-3.0, mature)
- **[ReTux](../retux.md)** (Python, GPL-3.0, mature, inactive since 2018)
- **[Ri-li](../ri-li.md)** (C++, GPL-3.0, mature, inactive since 2007)
- **[RickyD](../rickyd.md)** (C++, GPL-2.0, beta)
- **[Rigel Engine](../rigel_engine.md)** (C++, GPL-2.0, beta)
- **[Rigs of Rods](../rigs_of_rods.md)** (C, C++, AngelScript, GPL-3.0, mature)
- **[Riiablo](../riiablo.md)** (Java, Apache-2.0, beta)
- **[Rise of the Triad for Linux](../rise_of_the_triad_for_linux.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[rock-raiders-remake](../rock-raiders-remake.md)** (JavaScript, MIT, beta)
- **[Rockbot](../rockbot.md)** (C++, GPL-2.0, mature)
- **[Rocks'n'Diamonds](../rocksndiamonds.md)** (C, GPL-2.0, mature)
- **[Rogue Clone IV](../rogue_clone_iv.md)** (C, 3-clause BSD, mature, inactive since 2006)
- **[RogueBox Adventures](../roguebox_adventures.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Roguish](../roguish.md)** (JavaScript, 3-clause BSD, beta, inactive since 2015)
- **[Room for Change](../room_for_change.md)** (Java, Apache-2.0, mature, inactive since 2013)
- **[Rot Magus](../rot_magus.md)** (JavaScript, Apache-2.0, CC0, beta)
- **[Roton](../roton.md)** (C#, ISC, beta, inactive since 2019)
- **[RPG-X](../rpg-x.md)** (C, GPL-2.0, mature, inactive since 2015)
- **[rpgboss](../rpgboss.md)** (Scala, JavaScript, AGPL-3.0, beta, inactive since 2017)
- **[rRootage](../rrootage.md)** (C, 2-clause BSD, beta, inactive since 2004)
- **[Ruby-warrior](../ruby-warrior.md)** (Ruby, MIT, beta, inactive since 2012)
- **[RufasCube](../rufascube.md)** (Ada, GPL-2.0, mature)
- **[RufasSlider](../rufasslider.md)** (C++, GPL-2.0, mature)
- **[RufasSwap](../rufasswap.md)** (Ada, GPL-3.0, mature)
- **[RuneLite](../runelite.md)** (Java, 2-clause BSD, mature)
- **[Runfield](../runfield.md)** (JavaScript, GPL-3.0, mature, inactive since 2011)
- **[RuZZT](../ruzzt.md)** (Rust, MIT, beta)
- **[Ryzom Core](../ryzom_core.md)** (C++, AGPL-3.0, mature)
- **[S.C.O.U.R.G.E.](../scourge.md)** (C++, GPL-2.0, beta, inactive since 2008)
- **[SanAndreasUnity](../sanandreasunity.md)** (C#, MIT, mature)
- **[sandspiel](../sandspiel.md)** (Rust, JavaScript, TypeScript, MIT, beta)
- **[Sarah-Maries Eierjagd](../sarah-maries_eierjagd.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Scorched Moon](../scorched_moon.md)** (Python, GPL-3.0, beta)
- **[Scorched3D](../scorched3d.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[Scrabble3D](../scrabble3d.md)** (Pascal, GPL-3.0, mature, inactive since 2015)
- **[Scrap](../scrap.md)** (C, C++, GPL-2.0, mature, inactive since 2017)
- **[SDL Asylum](../sdl_asylum.md)** (C, GPL-3.0, mature, inactive since 2009)
- **[SDL Bomber](../sdl_bomber.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[SDL Sopwith](../sdl_sopwith.md)** (C, GPL-2.0, mature, inactive since 2014)
- **[SDL-Ball](../sdl-ball.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[SDLPoP](../sdlpop.md)** (C, GPL-3.0, mature)
- **[Search for the Red Herring](../search_for_the_red_herring.md)** (Python, GPL-2.0, mature, inactive since 2006)
- **[Secret Maryo Chronicles](../secret_maryo_chronicles.md)** (C++, GPL-3.0, mature, inactive since 2009)
- **[Sengoku: Warring States of Japan](../sengoku_warring_states_of_japan.md)** (C++, Lua, MIT, beta, inactive since 2008)
- **[sensitive-js](../sensitive-js.md)** (JavaScript, Custom, beta, inactive since 2017)
- **[Sentient Storage](../sentient_storage.md)** (Python, Public domain, mature)
- **[Settlers III remake](../settlers_iii_remake.md)** (Java, MIT, beta)
- **[Seven Kingdoms: Ancient Adversaries](../seven_kingdoms_ancient_adversaries.md)** (C++, GPL-2.0, mature)
- **[sfall](../sfall.md)** (C++, C, GPL-3.0, mature)
- **[shadow-of-the-beast-html5](../shadow-of-the-beast-html5.md)** (JavaScript, Apache-2.0, beta, inactive since 2017)
- **[Shadowgrounds](../shadowgrounds.md)** (C++, Custom, beta, inactive since 2017)
- **[SharpKonquest](../sharpkonquest.md)** (C#, GPL-2.0, mature, inactive since 2007)
- **[Shockolate](../shockolate.md)** (C, GPL-3.0, beta)
- **[Shotgun Debugger](../shotgun_debugger.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Siege of Avalon : Open Source](../siege_of_avalon_open_source.md)** (Pascal, Custom, beta, inactive since 2011)
- **[SilverTree](../silvertree.md)** (C++, GPL-3.0, beta, inactive since 2007)
- **[Simitone](../simitone.md)** (C#, MPL-2.0, beta)
- **[Simon Tatham's Portable Puzzle Collection](../simon_tathams_portable_puzzle_collection.md)** (C, MIT, mature)
- **[Simple Platformer](../simple_platformer.md)** (Java, MIT, beta, inactive since 2019)
- **[Simple-Solitaire](../simple-solitaire.md)** (Java, GPL-3.0, mature)
- **[Simsu](../simsu.md)** (C++, GPL-3.0, mature)
- **[Simutrans](../simutrans.md)** (C++, Artistic License-1.0, mature)
- **[Sinatra](../sinatra.md)** (C, GPL-3.0, mature, inactive since 2008)
- **[Sine](../sine.md)** (C, C++, MIT, beta)
- **[Sintel The Game](../sintel_the_game.md)** (Python, MIT, beta, inactive since 2014)
- **[Skifree-HTML5-clone](../skifree-html5-clone.md)** (JavaScript, GPL-3.0, beta, inactive since 2011)
- **[skifree.js](../skifreejs.md)** (JavaScript, MIT, mature, inactive since 2016)
- **[Skrupel - Tribute Compilation](../skrupel-tribute_compilation.md)** (PHP, JavaScript, GPL-2.0, mature, inactive since 2011)
- **[SLASH'EM](../slashem.md)** (C, R, C++, Custom, beta, inactive since 2007)
- **[Slay](../slay.md)** (Java, GPL-3.0, beta, inactive since 2010)
- **[Sleep Is Death](../sleep_is_death.md)** (C++, ?, mature, inactive since 2018)
- **[Slime Volley](../slime_volley.md)** (C, GPL-3.0, mature, inactive since 2010)
- **[Slime Volleyball](../slime_volleyball.md)** (C++, 3-clause BSD, beta)
- **[Slingshot](../slingshot.md)** (Python, GPL-2.0, beta, inactive since 2007)
- **[Slot-Racers](../slot-racers.md)** (C, GPL-3.0, mature, inactive since 2008)
- **[Sludge](../sludge.md)** (C, C++, Objective-C, LGPL-2.1, mature)
- **[Slune](../slune.md)** (Python, GPL-2.0, mature, inactive since 2007)
- **[Smash Battle](../smash_battle.md)** (C++, ?, beta, inactive since 2011)
- **[Smash](../smash.md)** (JavaScript, MIT, mature)
- **[snake](../snake.md)** (Java, WTFPL, mature, inactive since 2017)
- **[Snelps](../snelps.md)** (Ruby, LGPL-2.1, beta, inactive since 2012)
- **[Snowballz](../snowballz.md)** (Python, ?, beta, inactive since 2007)
- **[SokoSolve](../sokosolve.md)** (C#, GPL-3.0, mature, inactive since 2009)
- **[SolarWolf](../solarwolf.md)** (Python, LGPL-2.1, mature, inactive since 2004)
- **[Sole Collector](../sole_collector.md)** (Java, MIT, beta, inactive since 2018)
- **[Song of Albion](../song_of_albion.md)** (C, C++, Apache-2.0, mature, inactive since 2011)
- **[Sonic Robo Blast 2](../sonic_robo_blast_2.md)** (C, C++, GPL-2.0, mature)
- **[Sopwith 3](../sopwith_3.md)** (C, C++, Objective-C, GPL-2.0, beta, inactive since 2003)
- **[Source of Tales](../source_of_tales.md)** (Lua, GPL-3.0, mature, inactive since 2013)
- **[Sourcehold](../sourcehold.md)** (C++, MIT, beta)
- **[Space Faring](../space_faring.md)** (Java, GPL-3.0, beta)
- **[Space Harrier Clone](../space_harrier_clone.md)** (C, C++, MIT, beta, inactive since 2018)
- **[Space Nerds In Space](../space_nerds_in_space.md)** (C, Lua, GPL-2.0, beta)
- **[Space Opera](../space_opera.md)** (Java, GPL-2.0, beta, inactive since 2008)
- **[Space Station 13](../space_station_13.md)** (DM, AGPL-3.0, mature)
- **[Space Trader for Windows](../space_trader_for_windows.md)** (C#, GPL-2.0, mature, inactive since 2009)
- **[Space War](../space_war.md)** (Java, Apache-2.0, mature)
- **[SpaceTrader for Java](../spacetrader_for_java.md)** (Java, GPL-2.0, mature, inactive since 2010)
- **[SpaceZero](../spacezero.md)** (C, GPL-3.0, beta)
- **[Spartan Engine](../spartan_engine.md)** (C, C++, MIT, beta)
- **[Speed Dreams](../speed_dreams.md)** (C++, GPL-2.0, mature)
- **[Spice Trade](../spice_trade.md)** (Java, LGPL-2.0, mature, inactive since 2005)
- **[splexhd](../splexhd.md)** (C++, GPL-2.0, beta, inactive since 2012)
- **[Spludlow Tetris](../spludlow_tetris.md)** (C#, GPL-3.0, mature, inactive since 2018)
- **[Spooker Framework](../spooker_framework.md)** (C#, MIT, beta, inactive since 2014)
- **[Spring: 1944](../spring_1944.md)** (Lua, GPL-2.0, CC-BY-NC-3.0, mature)
- **[Spring](../spring.md)** (C++, C, Lua, GPL-2.0, mature)
- **[SS13 Remake](../ss13_remake.md)** (C#, GPL-3.0, beta, inactive since 2015)
- **[Star Maiden Astraea Rio](../star_maiden_astraea_rio.md)** (Ren'Py, MIT, mature)
- **[Star Ruler 2](../star_ruler_2.md)** (C, C++, MIT, mature)
- **[star-control2](../star-control2.md)** (C, C++, MIT, mature)
- **[Star-Wars-III](../star-wars-iii.md)** (Python, GPL-2.0, mature, inactive since 2014)
- **[StarBlastrix](../starblastrix.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[Stareater](../stareater.md)** (C#, GPL-3.0, beta)
- **[Stargus](../stargus.md)** (C++, Lua, GPL-2.0, beta, inactive since 2010)
- **[Stars! Nova](../stars_nova.md)** (C#, GPL-2.0, beta)
- **[starshatter-open](../starshatter-open.md)** (C++, 3-clause BSD, beta, inactive since 2015)
- **[Steamer Duck](../steamer_duck.md)** (Python, CC0, beta)
- **[Stendhal](../stendhal.md)** (Java, GPL-2.0, mature)
- **[StepMania](../stepmania.md)** (C, C++, Lua, MIT, mature)
- **[SteveTech1](../stevetech1.md)** (Java, MIT, beta, inactive since 2019)
- **[Story of a Lost Sky](../story_of_a_lost_sky.md)** (Python, 3-clause BSD, mature)
- **[Stratagus](../stratagus.md)** (C++, GPL-2.0, mature)
- **[StressFreeZone](../stressfreezone.md)** (C++, Lua, GPL-3.0, beta, inactive since 2007)
- **[Strife: Veteran Edition](../strife_veteran_edition.md)** (C, C++, Objective-C, GPL-3.0, beta, inactive since 2016)
- **[Stringrolled](../stringrolled.md)** (Python, Public domain, beta, inactive since 2008)
- **[Stunt Car Racer Remake](../stunt_car_racer_remake.md)** (C++, Proprietary, beta, inactive since 2012)
- **[Stunt Rally](../stunt_rally.md)** (C, C++, GPL-3.0, mature)
- **[Sudokuki](../sudokuki.md)** (C, Java, GPL-3.0, mature, inactive since 2016)
- **[Summoning Wars](../summoning_wars.md)** (C, C++, Lua, GPL-3.0, beta, inactive since 2014)
- **[SunDog Resurrection](../sundog_resurrection.md)** (Java, Python, ?, beta)
- **[sundog](../sundog.md)** (C, C++, Python, MIT, beta)
- **[Supaxl](../supaxl.md)** (JavaScript, MIT, mature)
- **[Super Methane Brothers for Wii and GameCube](../super_methane_brothers_for_wii_and_gamecube.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Super Methane Brothers](../super_methane_brothers.md)** (C++, GPL-2.0, mature, inactive since 2011)
- **[Super Tilt Bro](../super_tilt_bro.md)** (Assembly, Python, WTFPL, mature)
- **[Super Transball 2](../super_transball_2.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Supercars III](../supercars_iii.md)** (Java, ?, mature, inactive since 2014)
- **[SuperFoulEgg](../superfoulegg.md)** (Objective-C, C, MIT, mature, inactive since 2014)
- **[SuperTux](../supertux.md)** (C++, GPL-3.0, beta)
- **[SuperTuxKart](../supertuxkart.md)** (C++, C, GPL-3.0, mature)
- **[SuperTuxParty](../supertuxparty.md)** (GDScript, GPL-3.0, beta)
- **[Supremacy](../supremacy.md)** (C#, MS-RL, beta, inactive since 2014)
- **[Survivor](../survivor.md)** (JavaScript, CC-BY-NC-3.0, mature)
- **[SWP](../swp.md)** (C, C++, GPL-2.0, mature)
- **[Syndicate Wars Port](../syndicate_wars_port.md)** (C, GPL-3.0, beta, inactive since 2010)
- **[System Syzygy](../system_syzygy.md)** (Rust, GPL-3.0, mature, inactive since 2018)
- **[T-Bots](../t-bots.md)** (C, GPL-2.0, beta, inactive since 2004)
- **[T^3](../t3.md)** (C++, GPL-2.0, beta, inactive since 2005)
- **[Tactics Squad](../tactics_squad.md)** (C++, GPL-2.0, beta, inactive since 2007)
- **[Taggem](../taggem.md)** (JavaScript, AGPL-3.0, beta, inactive since 2014)
- **[Taisei Project](../taisei_project.md)** (C, Python, MIT, mature)
- **[Tales of Maj'Eyal](../tales_of_majeyal.md)** (C, Lua, GPL-3.0, mature)
- **[Tanglet](../tanglet.md)** (C++, GPL-3.0, mature)
- **[Tangomon](../tangomon.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Tank: Zone of Death](../tank_zone_of_death.md)** (C++, Lua, GPL-3.0, beta, inactive since 2017)
- **[TankistOnline](../tankistonline.md)** (Python, GPL-3.0, beta)
- **[Tanks of Freedom](../tanks_of_freedom.md)** (GDScript, MIT, mature)
- **[Tapir](../tapir.md)** (C, Ruby, Apache-2.0, MIT, beta, inactive since 2017)
- **[Team Tactics](../team_tactics.md)** (Java, MIT, beta, inactive since 2016)
- **[TecnoballZ](../tecnoballz.md)** (C++, GPL-3.0, beta, inactive since 2016)
- **[Teeworlds](../teeworlds.md)** (C, C++, zlib, beta, inactive since 2013)
- **[TekwarGDX](../tekwargdx.md)** (Java, Custom, beta)
- **[Tenes Empanadas Graciela](../tenes_empanadas_graciela.md)** (C, JavaScript, Perl, GPL-2.0, beta, inactive since 2015)
- **[Tennix!](../tennix.md)** (C, C++, GPL-2.0, mature)
- **[TermFrogger](../termfrogger.md)** (Ada, GPL-3.0, mature)
- **[TerminalApps](../terminalapps.md)** (Ada, GPL-3.0, mature)
- **[terrarium](../terrarium.md)** (C++, GPL-2.0, beta)
- **[TES3MP](../tes3mp.md)** (C++, GPL-3.0, beta)
- **[TetraVex](../tetravex.md)** (Swift, GPL-3.0, beta)
- **[Tetris (in C and NCURSES)](../tetris_in_c_and_ncurses.md)** (C, 3-clause BSD, mature)
- **[Tetzle](../tetzle.md)** (C++, GPL-3.0, mature)
- **[The Battle for Wesnoth](../the_battle_for_wesnoth.md)** (C, C++, Java, Python, Lua, GPL-2.0, mature)
- **[The Bub's Brothers](../the_bubs_brothers.md)** (Python, MIT, mature, inactive since 2013)
- **[The Butterfly Effect](../the_butterfly_effect.md)** (C++, GPL-2.0, beta)
- **[The Castles of Dr. Creep](../the_castles_of_dr_creep.md)** (C++, Shell, GPL-3.0, mature)
- **[The Clans](../the_clans.md)** (C, GPL-2.0, beta, inactive since 2003)
- **[The Dark Mod](../the_dark_mod.md)** (C++, GPL-3.0, mature)
- **[The Endless Dungeons](../the_endless_dungeons.md)** (C, CC-BY-NC-SA-2.0, mature, inactive since 2015)
- **[The Epic of Heroes](../the_epic_of_heroes.md)** (C++, GPL-3.0, beta, inactive since 2015)
- **[The Eternity Engine](../the_eternity_engine.md)** (C, C++, GPL-3.0, mature)
- **[The Force Engine](../the_force_engine.md)** (C++, GPL-2.0, beta)
- **[The hunt for the lost rainbow jewels (Jewelhunt)](../the_hunt_for_the_lost_rainbow_jewels_jewelhunt.md)** (Java, GPL-2.0, beta)
- **[The Legend of Edgar](../the_legend_of_edgar.md)** (C, GPL-2.0, mature)
- **[The Mana World](../the_mana_world.md)** (PHP, GPL-2.0, mature)
- **[The Powder Toy](../the_powder_toy.md)** (C++, C, Lua, Python, GPL-3.0, mature)
- **[The Rush](../the_rush.md)** (C++, GPL-2.0, beta, inactive since 2011)
- **[The Secret Chronicles of Dr. M.](../the_secret_chronicles_of_dr_m.md)** (C++, GPL-3.0, mature)
- **[The Ur-Quan Masters](../the_ur-quan_masters.md)** (C, GPL-2.0, mature, inactive since 2011)
- **[The-Trail](../the-trail.md)** (Java, MIT, Apache-2.0, beta, inactive since 2018)
- **[Theme Park Builder 3D CAD](../theme_park_builder_3d_cad.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[thiefcatcher](../thiefcatcher.md)** (C++, GPL-3.0, beta)
- **[Thousand Parsec](../thousand_parsec.md)** (C++, Python, GPL-2.0, beta, inactive since 2012)
- **[Thrive](../thrive.md)** (C++, AngelScript, JavaScript, GPL-3.0, beta)
- **[Thrust](../thrust.md)** (C, GPL-2.0, beta, inactive since 2006)
- **[Thunder Engine](../thunder_engine.md)** (C++, Apache-2.0, beta)
- **[Thunder&Lightning](../thunderlightning.md)** (C, C++, Io, GPL-2.0, beta, inactive since 2015)
- **[Thyme](../thyme.md)** (C, C++, GPL-2.0, beta)
- **[Tile World](../tile_world.md)** (C, GPL-2.0, mature, inactive since 2015)
- **[TinTin++](../tintin++.md)** (C, GPL-3.0, mature)
- **[Tiny Wings](../tiny_wings.md)** (Objective-C, C, C++, MIT, beta)
- **[TOMB5](../tomb5.md)** (C, C++, MIT, beta)
- **[Toppler](../toppler.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[TORCS, The Open Racing Car Simulator](../torcs_the_open_racing_car_simulator.md)** (C++, GPL-2.0, mature, inactive since 2016)
- **[Tornado](../tornado.md)** (C, GPL-2.0, mature, inactive since 2009)
- **[Torrega Race](../torrega_race.md)** (Lua, GPL-3.0, mature, inactive since 2015)
- **[Total Annihilation 3D](../total_annihilation_3d.md)** (C++, C, Lua, GPL-2.0, beta, inactive since 2017)
- **[TowerJumper](../towerjumper.md)** (C++, GDScript, GPL-3.0, mature)
- **[Trackballs](../trackballs.md)** (C++, Scheme, GPL-2.0, mature)
- **[Train](../train.md)** (Java, 3-clause BSD, beta)
- **[Transcend](../transcend.md)** (C++, Dia, ?, beta, inactive since 2005)
- **[Transfusion](../transfusion.md)** (C, GPL-2.0, beta, inactive since 2007)
- **[Tremfusion](../tremfusion.md)** (C, GPL-2.0, mature, inactive since 2009)
- **[Tremulous](../tremulous.md)** (C, GPL-2.0, mature, inactive since 2016)
- **[Tressette](../tressette.md)** (C++, GPL-2.0, mature, inactive since 2017)
- **[Trigger](../trigger.md)** (C++, GPL-2.0, beta)
- **[Trinity Reign](../trinity_reign.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[Trip on the Funny Boat](../trip_on_the_funny_boat.md)** (Python, GPL-2.0, mature, inactive since 2007)
- **[TripleA](../triplea.md)** (Java, GPL-2.0, mature)
- **[TROPHY](../trophy.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[TrueCraft](../truecraft.md)** (C#, MIT, beta, inactive since 2018)
- **[Tumbly Towers](../tumbly_towers.md)** (Java, MIT, beta, inactive since 2017)
- **[Tumiki Fighters](../tumiki_fighters.md)** (D, C++, 2-clause BSD, mature, inactive since 2005)
- **[Turious](../turious.md)** (C, GPL-3.0, beta, inactive since 2014)
- **[Turn of War](../turn_of_war.md)** (Java, GPL-3.0, beta, inactive since 2014)
- **[TurokEX](../turokex.md)** (C++, C, GPL-2.0, beta, inactive since 2014)
- **[TUSSLE](../tussle.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Tux Football](../tux_football.md)** (C++, GPL-2.0, beta, inactive since 2012)
- **[Tux of Math Command](../tux_of_math_command.md)** (C, GPL-3.0, mature, inactive since 2011)
- **[Tux Paint](../tux_paint.md)** (C, C++, GPL-2.0, beta)
- **[Tux Racer](../tux_racer.md)** (C, GPL-2.0, beta, inactive since 2001)
- **[Tuxemon](../tuxemon.md)** (Python, GPL-3.0, mature)
- **[TuxKart](../tuxkart.md)** (C++, GPL-2.0, beta, inactive since 2004)
- **[TVTower](../tvtower.md)** (BlitzMax, Lua, Custom, mature)
- **[twin-e](../twin-e.md)** (C, GPL-2.0, beta, inactive since 2015)
- **[TwinEngine](../twinengine.md)** (C, GPL-2.0, mature, inactive since 2015)
- **[Tyger](../tyger.md)** (Python, ?, beta, inactive since 2016)
- **[Tyrian Remake](../tyrian_remake.md)** (Java, GPL-2.0, beta)
- **[TyrQuake](../tyrquake.md)** (C, GPL-2.0, beta)
- **[UA_source](../uasource.md)** (C++, GPL-2.0, beta)
- **[Uebergame](../uebergame.md)** (TorqueScript, C#, MIT, mature)
- **[UFO2000](../ufo2000.md)** (C, C++, Lua, GPL-2.0, mature, inactive since 2012)
- **[UFO: Alien Invasion](../ufo_alien_invasion.md)** (C, C++, GPL-2.0, mature)
- **[Ularn](../ularn.md)** (C, C++, GPL-2.0, mature, inactive since 2018)
- **[UlDunAd](../uldunad.md)** (Python, GPL-3.0, beta, inactive since 2011)
- **[Ultima 5 Redux](../ultima_5_redux.md)** (C#, MIT, beta)
- **[Ultimate Stunts](../ultimate_stunts.md)** (C++, GPL-2.0, beta, inactive since 2013)
- **[UltraStar Deluxe](../ultrastar_deluxe.md)** (Pascal, GPL-2.0, mature)
- **[UltraStar](../ultrastar.md)** (Pascal, ?, mature, inactive since 2010)
- **[uMario](../umario.md)** (C++, GPL-2.0, beta, inactive since 2016)
- **[Umbra](../umbra.md)** (Python, Custom, beta, inactive since 2002)
- **[UnCiv](../unciv.md)** (Kotlin, MPL-2.0, beta)
- **[Underworld Adventures](../underworld_adventures.md)** (C++, Lua, GPL-2.0, beta)
- **[UnderworldExporter](../underworldexporter.md)** (C#, C++, MIT, mature)
- **[uninvited](../uninvited.md)** (C, C++, Artistic License-2.0, beta, inactive since 2016)
- **[unitystation](../unitystation.md)** (C#, AGPL-3.0, beta)
- **[Unknown Horizons](../unknown_horizons.md)** (Python, GPL-2.0, beta)
- **[UnNetHack](../unnethack.md)** (C, Custom, mature)
- **[Unvanquished](../unvanquished.md)** (C, C++, GPL-3.0, mature)
- **[urde](../urde.md)** (C, C++, MIT, beta)
- **[Valyria Tear](../valyria_tear.md)** (Lua, C++, C, GPL-2.0, mature)
- **[Vamos](../vamos.md)** (C++, Python, GPL-3.0, beta, inactive since 2014)
- **[Vanilla-Conquer](../vanilla-conquer.md)** (C, C++, Assembly, GPL-3.0, mature)
- **[VCMI](../vcmi.md)** (C++, GPL-2.0, mature)
- **[VDrift](../vdrift.md)** (C++, GPL-3.0, mature, inactive since 2014)
- **[Vectoroids](../vectoroids.md)** (C, GPL-2.0, mature, inactive since 2002)
- **[Vegan on a Desert Island](../vegan_on_a_desert_island.md)** (Lua, GPL-3.0, beta)
- **[Veloren](../veloren.md)** (Rust, GPL-3.0, beta)
- **[Veraball](../veraball.md)** (GDScript, MIT, beta, inactive since 2016)
- **[Vertigo](../vertigo.md)** (C, GPL-2.0, beta, inactive since 2002)
- **[Violetland](../violetland.md)** (C++, GPL-3.0, beta)
- **[Visual Pinball](../visual_pinball.md)** (C++, MAME, mature)
- **[vitetris](../vitetris.md)** (C, 2-clause BSD, beta)
- **[vkQuake](../vkquake.md)** (C, C++, GPL-2.0, mature)
- **[VMS Empire](../vms_empire.md)** (C, GPL-2.0, mature, inactive since 2014)
- **[Vocaluxe](../vocaluxe.md)** (C#, C++, GPL-3.0, beta, inactive since 2018)
- **[Vortice](../vortice.md)** (C#, MIT, mature)
- **[Vorton](../vorton.md)** (C, GPL-3.0, beta, inactive since 2004)
- **[Voxelands](../voxelands.md)** (C++, GPL-3.0, beta)
- **[Vulture's Eye](../vultures_eye.md)** (C++, NetHack General Public License, mature, inactive since 2015)
- **[VVVVVV](../vvvvvv.md)** (ActionScript, C++, Custom, mature)
- **[WallBall](../wallball.md)** (Haxe, JavaScript, GPL-3.0, mature)
- **[War Of Kingdom](../war_of_kingdom.md)** (C, C++, GPL-2.0, beta)
- **[War1](../war1.md)** (C, zlib, beta)
- **[warcraft-remake](../warcraft-remake.md)** (Java, GPL-2.0, beta)
- **[Wargamer](../wargamer.md)** (C++, GPL-2.0, mature, inactive since 2003)
- **[Wargus](../wargus.md)** (C++, Lua, GPL-2.0, mature)
- **[Wario-Land-3](../wario-land-3.md)** (Python, MIT, beta, inactive since 2018)
- **[WarMUX](../warmux.md)** (C++, GPL-2.0, beta, inactive since 2018)
- **[Warp Rogue](../warp_rogue.md)** (C, GPL-3.0, beta, inactive since 2010)
- **[Warzone 2100](../warzone_2100.md)** (C++, GPL-2.0, mature)
- **[Waste's Edge](../wastes_edge.md)** (Python, GPL-2.0, beta)
- **[WAtomic](../watomic.md)** (Pascal, GPL-2.0, mature, inactive since 2005)
- **[WebChess](../webchess.md)** (PHP, GPL-3.0, mature, inactive since 2010)
- **[WebFun](../webfun.md)** (TypeScript, MIT, beta)
- **[WebHangman](../webhangman.md)** (JavaScript, GPL-2.0, mature, inactive since 2003)
- **[Which Way Is Up?](../which_way_is_up.md)** (Python, GPL-2.0, beta, inactive since 2008)
- **[Widelands](../widelands.md)** (C, C++, Lua, Python, GPL-2.0, mature)
- **[Windstille](../windstille.md)** (C++, Scheme, GPL-3.0, beta, inactive since 2017)
- **[Witch Blast](../witch_blast.md)** (C++, GPL-3.0, beta, inactive since 2015)
- **[WitchavenGDX](../witchavengdx.md)** (Java, Custom, beta)
- **[Wizardry Legacy](../wizardry_legacy.md)** (C++, GPL-3.0, beta, inactive since 2018)
- **[Wizards Magic](../wizards_magic.md)** (Python, GPL-2.0, mature, inactive since 2012)
- **[Wizznic!](../wizznic.md)** (C, GPL-3.0, beta, inactive since 2016)
- **[wkbre](../wkbre.md)** (C++, C, GPL-3.0, beta)
- **[Wograld](../wograld.md)** (C, GPL-2.0, beta)
- **[Wolf3dX](../wolf3dx.md)** (C#, GPL-2.0, beta)
- **[Wolfpack Empire](../wolfpack_empire.md)** (C, GPL-3.0, mature)
- **[Word War vi](../word_war_vi.md)** (C, GPL-2.0, mature)
- **[World of Heroes](../world_of_heroes.md)** (Python, 3-clause BSD, beta, inactive since 2009)
- **[World of Might and Magic](../world_of_might_and_magic.md)** (C++, LGPL-3.0, beta)
- **[World of Phaos](../world_of_phaos.md)** (PHP, GPL-2.0, mature, inactive since 2011)
- **[WWW](../www.md)** (JavaScript, GPL-3.0, beta, inactive since 2014)
- **[Wyrmsun](../wyrmsun.md)** (Lua, C++, GPL-2.0, mature)
- **[X-Force: Fight For Destiny](../x-force_fight_for_destiny.md)** (Pascal, GPL-2.0, beta, inactive since 2011)
- **[X-Moto](../x-moto.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[XArchon](../xarchon.md)** (C, C++, GPL-2.0, beta, inactive since 2003)
- **[xBaK](../xbak.md)** (C++, GPL-3.0, beta, inactive since 2013)
- **[XBill](../xbill.md)** (C, GPL-2.0, mature, inactive since 2001)
- **[XBlast](../xblast.md)** (C, GPL-2.0, mature, inactive since 2005)
- **[Xconq](../xconq.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[xdigger](../xdigger.md)** (C, GPL-2.0, mature, inactive since 1999)
- **[xDuke](../xduke.md)** (C, GPL-2.0, beta, inactive since 2010)
- **[Xenowar](../xenowar.md)** (C, C++, GPL-3.0, mature, inactive since 2014)
- **[XInvaders 3D](../xinvaders_3d.md)** (C, GPL-2.0, mature, inactive since 2000)
- **[Xjig](../xjig.md)** (C, Custom, mature)
- **[XMage](../xmage.md)** (Java, MIT, mature)
- **[Xonotic](../xonotic.md)** (C, GPL-3.0, mature)
- **[XorCurses](../xorcurses.md)** (C, GPL-3.0, beta, inactive since 2012)
- **[XPilot NG](../xpilot_ng.md)** (C, GPL-2.0, mature, inactive since 2010)
- **[XPilot](../xpilot.md)** (C, GPL-2.0, mature, inactive since 2010)
- **[XScavenger](../xscavenger.md)** (C, GPL-2.0, mature, inactive since 2015)
- **[XSera](../xsera.md)** (C, Lua, MIT, beta, inactive since 2010)
- **[XSwing Plus](../xswing_plus.md)** (Java, GPL-3.0, beta, inactive since 2010)
- **[xu4](../xu4.md)** (C++, GPL-2.0, mature, inactive since 2016)
- **[Xultris](../xultris.md)** (JavaScript, XUL, MPL-1.1, mature, inactive since 2011)
- **[Xye](../xye.md)** (C++, zlib, beta, inactive since 2013)
- **[Yamagi Quake II](../yamagi_quake_ii.md)** (C, GPL-2.0, mature)
- **[Yet Another Engine](../yet_another_engine.md)** (MoonScript, Java, Lua, MIT, beta, inactive since 2016)
- **[Yo Frankie!](../yo_frankie.md)** (Blender Script, ?, mature, inactive since 2009)
- **[Yorg](../yorg.md)** (Python, GPL-3.0, beta)
- **[YSoccer](../ysoccer.md)** (Java, GPL-2.0, mature)
- **[ZAngband](../zangband.md)** (C, Custom, mature, inactive since 2005)
- **[Zatacka X](../zatacka_x.md)** (C, GPL-3.0, beta)
- **[Zatacka](../zatacka.md)** (C, C++, GPL-2.0, beta, inactive since 2007)
- **[Zauberer](../zauberer.md)** (None, ISC, beta, inactive since 2018)
- **[Zaz](../zaz.md)** (C++, GPL-3.0, beta, inactive since 2010)
- **[ZDoom](../zdoom.md)** (C, C++, ZenScript, GPL-3.0, mature)
- **[Zed Online](../zed_online.md)** (C++, ?, mature)
- **[Zelda Classic](../zelda_classic.md)** (C, C++, GPL-3.0, mature)
- **[Zelda: Mystery of Solarus DX](../zelda_mystery_of_solarus_dx.md)** (Lua, GPL-3.0, mature)
- **[Zero Ballistics](../zero_ballistics.md)** (C++, MIT, mature, inactive since 2013)
- **[Zero-K](../zero-k.md)** (Lua, GPL-2.0, mature)
- **[Zetawar](../zetawar.md)** (Clojure, MIT, mature)
- **[Zod Engine](../zod_engine.md)** (C++, ?, mature, inactive since 2018)
- **[Zone of Control](../zone_of_control.md)** (Rust, Apache-2.0, beta, inactive since 2017)
- **[zorkClone](../zorkclone.md)** (Java, Apache-2.0, beta)
- **[zztgo](../zztgo.md)** (Go, MIT, beta)