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

- **[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)
- **[AdaDoom3](../adadoom3.md)** (Ada, GPL-3.0, beta)
- **[Adanaxis](../adanaxis.md)** (C++, GPL-2.0, mature, inactive since 2007)
- **[Afternoon Stalker](../afternoon_stalker.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[Ajax3d](../ajax3d.md)** (JavaScript, GPL-2.0, beta, inactive since 2007)
- **[Aleph One](../aleph_one.md)** (C++, Lua, GPL-3.0, mature)
- **[alive](../alive.md)** (C++, MIT, beta)
- **[Anarch](../anarch.md)** (C, C++, CC0, mature)
- **[Ardentryst](../ardentryst.md)** (Python, GPL-3.0, mature, inactive since 2009)
- **[Ares Dogfighter](../ares_dogfighter.md)** (Java, GPL-3.0, beta, inactive since 2016)
- **[Armagetron Advanced](../armagetron_advanced.md)** (C++, GPL-2.0, mature)
- **[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)
- **[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++, C, GPL-2.0, mature, inactive since 2016)
- **[Awkaster](../awkaster.md)** (AWK, MIT, mature, inactive since 2017)
- **[Ball and Paddle](../ball_and_paddle.md)** (C++, Scheme, Shell, 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)
- **[Batrachians](../batrachians.md)** (C++, GPL-2.0, beta, inactive since 2012)
- **[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)
- **[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)
- **[Biniax](../biniax.md)** (C, zlib, mature, inactive since 2012)
- **[Bitfighter](../bitfighter.md)** (C, C++, GPL-2.0, mature)
- **[BlakedAwesomenaughts](../blakedawesomenaughts.md)** (JavaScript, PHP, MIT, beta, inactive since 2015)
- **[Blasphemer](../blasphemer.md)** (None, Python, None, mature, inactive since 2017)
- **[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)
- **[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)
- **[BOOM: Remake](../boom_remake.md)** (C++, Custom, mature)
- **[Boulder Dash](../boulder_dash.md)** (Java, MIT, mature, inactive since 2015)
- **[bratwurst](../bratwurst.md)** (Lisp, GPL-2.0, mature, inactive since 2009)
- **[Breakout-VR](../breakout-vr.md)** (C#, MIT, beta, inactive since 2017)
- **[BRIQUOLO](../briquolo.md)** (C++, GPL-3.0, mature, inactive since 2008)
- **[British Bingo](../british_bingo.md)** (JavaScript, GPL-3.0, mature)
- **[buggyGame](../buggygame.md)** (Python, GPL-2.0, beta, inactive since 2007)
- **[BurgerSpace](../burgerspace.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[BZFlag](../bzflag.md)** (C++, LGPL-2.1, MPL-2.0, mature)
- **[C-Dogs SDL](../c-dogs_sdl.md)** (C, GPL-2.0, mature)
- **[Cabbages and Kings](../cabbages_and_kings.md)** (Python, MIT, mature)
- **[Cadaver](../cadaver.md)** (C++, GPL-2.0, beta, inactive since 2009)
- **[Cannonball](../cannonball.md)** (C++, MAME, beta)
- **[Carnage3D](../carnage3d.md)** (C++, C, MIT, beta)
- **[Cat Mother Dead Justice](../cat_mother_dead_justice.md)** (C++, 3-clause BSD, GPL-2.0, beta, inactive since 2003)
- **[Catacomb 3-D](../catacomb_3-d.md)** (C, C++, GPL-2.0, mature, inactive since 1991)
- **[Catacomb](../catacomb.md)** (Pascal, GPL-2.0, mature, inactive since 1989)
- **[Cattle Bity](../cattle_bity.md)** (TypeScript, MIT, 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)
- **[Celestron](../celestron.md)** (Python, GPL-3.0, beta, inactive since 2012)
- **[Chocolate Doom](../chocolate_doom.md)** (C, GPL-2.0, mature)
- **[Chocolate Duke3D](../chocolate_duke3d.md)** (C, GPL-2.0, Custom, beta, inactive since 2016)
- **[Chromium B.S.U.](../chromium_bsu.md)** (C++, Artistic License-1.0, mature)
- **[Circus Linux!](../circus_linux.md)** (C, GPL-2.0, mature, inactive since 2000)
- **[Classic RBDoom 3 BFG](../classic_rbdoom_3_bfg.md)** (C, C++, GPL-3.0, mature)
- **[Clonepoint](../clonepoint.md)** (C++, GPL-3.0, beta)
- **[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)
- **[Cosmosmash](../cosmosmash.md)** (C++, GPL-2.0, mature, inactive since 2013)
- **[Creep Smash](../creep_smash.md)** (Java, GPL-3.0, beta, inactive since 2011)
- **[Cross The Road](../cross_the_road.md)** (Elm, JavaScript, AGPL-3.0, mature)
- **[Der Clou!](../der_clou.md)** (C, Custom, beta, inactive since 2017)
- **[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)
- **[Digger Remastered](../digger_remastered.md)** (C, GPL-2.0, mature, inactive since 2004)
- **[donut](../donut.md)** (C, C++, GPL-3.0, beta)
- **[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++, 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)
- **[dRally](../drally.md)** (Assembly, C, MIT, beta)
- **[DUGA](../duga.md)** (Python, MPL-2.0, beta, inactive since 2018)
- **[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)
- **[Dungeon Monkey Unlimited](../dungeon_monkey_unlimited.md)** (Pascal, LGPL-2.1, mature, inactive since 2010)
- **[DynaDungeons](../dynadungeons.md)** (GDScript, GPL-3.0, beta, inactive since 2018)
- **[EdisonEngine](../edisonengine.md)** (C++, Python, LGPL-3.0, beta)
- **[EDuke32](../eduke32.md)** (C, C++, GPL-2.0, mature)
- **[Epiar](../epiar.md)** (C, C++, Lua, GPL-2.0, beta)
- **[ET: Legacy](../et_legacy.md)** (C, C++, Lua, GPL-3.0, mature)
- **[Excellent Bifurcation](../excellent_bifurcation.md)** (C, GPL-2.0, mature, inactive since 2007)
- **[ezQuake](../ezquake.md)** (C, C++, GPL-2.0, mature)
- **[Fire Strike Retro](../fire_strike_retro.md)** (Java, Haxe, JavaScript, Ruby, PHP, MIT, mature)
- **[Fitzquake](../fitzquake.md)** (C, GPL-2.0, beta, inactive since 2009)
- **[Flukz](../flukz.md)** (C++, GPL-2.0, beta, inactive since 2014)
- **[FQuake3](../fquake3.md)** (F#, C, GPL-2.0, beta, inactive since 2014)
- **[fRaBs](../frabs.md)** (Lisp, C++, C, Public domain, mature, inactive since 2016)
- **[freeablo](../freeablo.md)** (C++, GPL-3.0, beta)
- **[FreeCS](../freecs.md)** (QuakeC, GPL-2.0, mature)
- **[Freedoom](../freedoom.md)** (None, Python, None, beta)
- **[FreePrince](../freeprince.md)** (C, GPL-2.0, beta, inactive since 2011)
- **[FTEQW](../fteqw.md)** (C, GPL-2.0, mature)
- **[Galaxy Forces V2](../galaxy_forces_v2.md)** (C++, Public domain, mature)
- **[Gang Garrison 2](../gang_garrison_2.md)** (Game Maker Script, MPL-2.0, mature)
- **[GDash](../gdash.md)** (C++, MIT, beta)
- **[GDHexGrid](../gdhexgrid.md)** (GDScript, MIT, mature)
- **[ges-code](../ges-code.md)** (C, C++, GPL-3.0, mature)
- **[Ghostly](../ghostly.md)** (C++, GPL-3.0, mature, inactive since 2016)
- **[GL TRON](../gl_tron.md)** (Java, GPL-3.0, mature, inactive since 2012)
- **[GL-117](../gl-117.md)** (C++, GPL-2.0, mature, inactive since 2005)
- **[Gloomy Dungeons 2](../gloomy_dungeons_2.md)** (Java, MIT, mature)
- **[Gloomy Dungeons](../gloomy_dungeons.md)** (Java, MIT, mature, inactive since 2018)
- **[GLtron](../gltron.md)** (C, ?, beta, inactive since 2017)
- **[GPL Arcade Volleyball](../gpl_arcade_volleyball.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[Granatier](../granatier.md)** (C++, GPL-2.0, mature)
- **[Grimsonland](../grimsonland.md)** (JavaScript, TypeScript, MIT, mature, inactive since 2017)
- **[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)
- **[GZDoom](../gzdoom.md)** (C, C++, GPL-3.0, mature)
- **[Hammer of Thyrion](../hammer_of_thyrion.md)** (C, GPL-2.0, mature)
- **[Head over Heels](../head_over_heels.md)** (C++, GPL-3.0, mature)
- **[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)
- **[Hexoshi](../hexoshi.md)** (Python, GPL-3.0, beta, inactive since 2016)
- **[HolySpirit](../holyspirit.md)** (C++, Haskell, GPL-3.0, beta, inactive since 2013)
- **[Hovertank3D](../hovertank3d.md)** (C++, Assembly, GPL-2.0, mature, inactive since 2014)
- **[iiChantra](../iichantra.md)** (C++, MIT, beta, inactive since 2012)
- **[IMaze](../imaze.md)** (C, 4-clause BSD, mature, inactive since 2001)
- **[ioquake3](../ioquake3.md)** (C, GPL-2.0, mature)
- **[Jake2](../jake2.md)** (Java, GPL-2.0, beta, inactive since 2006)
- **[JediAcademyLinux](../jediacademylinux.md)** (C++, GPL-2.0, beta, inactive since 2017)
- **[Jet-Story](../jet-story.md)** (Assembly, C, C++, MIT, beta)
- **[Kartering](../kartering.md)** (C, GPL-2.0, MIT, ISC, beta, inactive since 2015)
- **[Key Runner](../key_runner.md)** (C++, Shell, GPL-3.0, mature, inactive since 2013)
- **[KGoldrunner](../kgoldrunner.md)** (C++, GPL-2.0, mature)
- **[Kobo Deluxe](../kobo_deluxe.md)** (C++, GPL-2.0, beta, inactive since 2007)
- **[KRaptor](../kraptor.md)** (C, MIT, beta, inactive since 2004)
- **[LastTry](../lasttry.md)** (Java, MIT, beta, inactive since 2017)
- **[LGames](../lgames.md)** (C++, GPL-2.0, mature)
- **[Librelancer](../librelancer.md)** (C, C#, MIT, beta)
- **[LibreQuake](../librequake.md)** (Python, 3-clause BSD, beta)
- **[LieroLibre](../lierolibre.md)** (C++, 2-clause BSD, mature, inactive since 2017)
- **[Linwarrior 3D](../linwarrior_3d.md)** (C++, Apache-2.0, mature, inactive since 2010)
- **[LionEngine](../lionengine.md)** (Java, GPL-3.0, mature)
- **[Liquid War](../liquid_war.md)** (C, Shell, GPL-3.0, mature, inactive since 2015)
- **[Lugaru](../lugaru.md)** (C++, GPL-2.0, mature)
- **[Maelstrom](../maelstrom.md)** (C, C++, GPL-2.0, mature, inactive since 2002)
- **[MafiaUnity](../mafiaunity.md)** (C#, Apache-2.0, beta, inactive since 2020)
- **[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)
- **[MicroWar 2.0](../microwar_20.md)** (Python, 3-clause BSD, mature, inactive since 2009)
- **[Mindustry](../mindustry.md)** (Java, GPL-3.0, mature)
- **[Mininim](../mininim.md)** (C, GPL-3.0, beta, inactive since 2017)
- **[mk.js](../mkjs.md)** (JavaScript, MIT, beta)
- **[Moon-buggy](../moon-buggy.md)** (C, GPL-2.0, mature, inactive since 2006)
- **[Mr.Boom](../mrboom.md)** (C++, C, MIT, mature)
- **[Mtp Target](../mtp_target.md)** (C++, GPL-2.0, mature, inactive since 2008)
- **[Netrek](../netrek.md)** (C, Custom, mature, inactive since 2009)
- **[Neverball](../neverball.md)** (C, C++, GPL-2.0, mature)
- **[Nexuiz](../nexuiz.md)** (C++, GPL-2.0, mature)
- **[noiz2-droid](../noiz2-droid.md)** (Java, 2-clause BSD, mature, inactive since 2015)
- **[Not Pacman](../not_pacman.md)** (Lua, WTFPL, mature, inactive since 2013)
- **[Nuncabola](../nuncabola.md)** (Java, GPL-2.0, beta)
- **[nXtank](../nxtank.md)** (Python, C++, GPL-3.0, beta, inactive since 2010)
- **[Ogrian Carpet](../ogrian_carpet.md)** (C++, MIT, beta, inactive since 2018)
- **[Open Surge](../open_surge.md)** (C, GPL-3.0, beta)
- **[Open Zelda](../open_zelda.md)** (C, C++, zlib, mature, inactive since 2015)
- **[OpenArena](../openarena.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[OpenClonk](../openclonk.md)** (C, C++, ISC, mature)
- **[OpenDiablo2](../opendiablo2.md)** (Go, GPL-3.0, mature)
- **[OpenFire](../openfire.md)** (C, MIT, beta, inactive since 2018)
- **[OpenJK](../openjk.md)** (C, C++, GPL-2.0, beta)
- **[OpenLara](../openlara.md)** (C++, C, 2-clause BSD, mature)
- **[OpenLiero](../openliero.md)** (C++, C, Custom, mature, inactive since 2015)
- **[OpenLieroX](../openlierox.md)** (C++, LGPL-2.0, mature)
- **[OpenMortal](../openmortal.md)** (C++, Perl, GPL-2.0, beta, inactive since 2006)
- **[openMSX](../openmsx.md)** (C++, GPL-2.0, mature)
- **[OpenNotrium](../opennotrium.md)** (C++, GPL-3.0, beta)
- **[OpenOMF](../openomf.md)** (C, C++, MIT, beta)
- **[OpenRaider](../openraider.md)** (C, C++, GPL-2.0, beta, inactive since 2015)
- **[OpenRW](../openrw.md)** (C, C++, GPL-3.0, beta)
- **[OpenTomb](../opentomb.md)** (C, C++, Lua, LGPL-3.0, beta)
- **[OpenTyrian](../opentyrian.md)** (C, GPL-2.0, beta, inactive since 2018)
- **[OpenXRay](../openxray.md)** (C++, Lua, ?, mature)
- **[OpenYandere](../openyandere.md)** (C#, GPL-3.0, beta, inactive since 2018)
- **[Pacewar](../pacewar.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[PainTown](../paintown.md)** (C++, Java, Python, 3-clause BSD, mature)
- **[Pang Zero](../pang_zero.md)** (Perl, GPL-2.0, beta, inactive since 2007)
- **[PCExhumed](../pcexhumed.md)** (C++, Custom, beta)
- **[Point & Hit](../point_hit.md)** (Java, GPL-3.0, mature, inactive since 2017)
- **[Potato Killer](../potato_killer.md)** (Python, GPL-3.0, beta, inactive since 2011)
- **[PowerslaveGDX](../powerslavegdx.md)** (Java, Custom, beta)
- **[Prince-Monogame](../prince-monogame.md)** (C#, GPL-2.0, beta)
- **[QuakeSpasm](../quakespasm.md)** (C, GPL-2.0, mature)
- **[Rabbit Escape](../rabbit_escape.md)** (Java, GPL-2.0, mature)
- **[RAD](../rad.md)** (Pascal, C, GPL-2.0, mature)
- **[Raptor: Call of the Shadows](../raptor_call_of_the_shadows.md)** (C, GPL-3.0, beta)
- **[RaumBaller](../raumballer.md)** (Java, GPL-3.0, mature)
- **[Raze](../raze.md)** (C++, GPL-2.0, mature)
- **[Red Eclipse](../red_eclipse.md)** (C++, zlib, mature)
- **[RedneckGDX](../redneckgdx.md)** (Java, Custom, beta)
- **[Rednukem](../rednukem.md)** (C++, Custom, beta)
- **[remc2](../remc2.md)** (C, GPL-3.0, mature)
- **[Rescue! Max](../rescue_max.md)** (Java, GPL-3.0, beta, inactive since 2013)
- **[Return of Dr. Destructo](../return_of_dr_destructo.md)** (C++, MIT, mature, inactive since 2015)
- **[Rigel Engine](../rigel_engine.md)** (C++, GPL-2.0, beta)
- **[Rise of the Triad for Linux](../rise_of_the_triad_for_linux.md)** (C, GPL-2.0, mature, inactive since 2012)
- **[Robot Redemption](../robot_redemption.md)** (C++, CC-BY-NC-SA-4.0, GPL-2.0, mature, inactive since 2014)
- **[rock-raiders-remake](../rock-raiders-remake.md)** (JavaScript, MIT, beta)
- **[Rocks'n'Diamonds](../rocksndiamonds.md)** (C, GPL-2.0, mature)
- **[Rott94](../rott94.md)** (C, C++, GPL-2.0, beta)
- **[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, C++, GPL-2.0, mature, inactive since 2014)
- **[SDLPoP](../sdlpop.md)** (C, GPL-3.0, mature)
- **[Secret Maryo Chronicles](../secret_maryo_chronicles.md)** (C++, GPL-3.0, mature, inactive since 2009)
- **[sensitive-js](../sensitive-js.md)** (JavaScript, Custom, beta, inactive since 2017)
- **[shadow-of-the-beast-html5](../shadow-of-the-beast-html5.md)** (JavaScript, Apache-2.0, beta, inactive since 2017)
- **[Sine](../sine.md)** (C, C++, MIT, beta)
- **[Slune](../slune.md)** (Python, GPL-2.0, mature, inactive since 2007)
- **[Smash Battle](../smash_battle.md)** (C++, GPL-2.0, beta, inactive since 2011)
- **[Smash](../smash.md)** (JavaScript, MIT, mature)
- **[Solarus](../solarus.md)** (C, C++, Lua, GPL-3.0, mature)
- **[SolarWolf](../solarwolf.md)** (Python, LGPL-2.1, mature, inactive since 2004)
- **[Soldat](../soldat.md)** (C, Pascal, MIT, mature)
- **[Sole Collector](../sole_collector.md)** (Java, MIT, beta, inactive since 2018)
- **[SpacePeng!](../spacepeng.md)** (Java, GPL-3.0, mature, inactive since 2017)
- **[Speed Dreams](../speed_dreams.md)** (C++, GPL-2.0, mature)
- **[StarBlastrix](../starblastrix.md)** (C++, GPL-2.0, beta, inactive since 2006)
- **[starshatter-open](../starshatter-open.md)** (C++, 3-clause BSD, beta, inactive since 2015)
- **[Starun](../starun.md)** (Java, GPL-3.0, mature, inactive since 2017)
- **[Stunt Rally](../stunt_rally.md)** (C, C++, GPL-3.0, mature)
- **[SuperTuxKart](../supertuxkart.md)** (C++, C, GPL-3.0, mature)
- **[SuperTuxParty](../supertuxparty.md)** (GDScript, GPL-3.0, beta)
- **[Syndicate Wars Port](../syndicate_wars_port.md)** (C, GPL-3.0, beta, inactive since 2010)
- **[Taisei Project](../taisei_project.md)** (C, Python, MIT, mature)
- **[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)
- **[Team Tactics](../team_tactics.md)** (Java, MIT, beta, inactive since 2016)
- **[TekwarGDX](../tekwargdx.md)** (Java, Custom, beta)
- **[terrarium](../terrarium.md)** (C++, Shell, GPL-2.0, beta)
- **[The Catacomb](../the_catacomb.md)** (C, C++, GPL-2.0, mature, inactive since 1990)
- **[The Force Engine](../the_force_engine.md)** (C++, GPL-2.0, beta)
- **[The Legend of Edgar](../the_legend_of_edgar.md)** (C, GPL-2.0, mature)
- **[Thugaim](../thugaim.md)** (Java, MIT, mature, inactive since 2017)
- **[Toppler](../toppler.md)** (C++, GPL-2.0, mature, inactive since 2012)
- **[Torso Ninja 2](../torso_ninja_2.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Torso Ninja](../torso_ninja.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[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)
- **[TUSSLE](../tussle.md)** (Python, GPL-3.0, mature, inactive since 2017)
- **[Tux Racer](../tux_racer.md)** (C, C++, GPL-2.0, beta, inactive since 2001)
- **[Tyrian Remake](../tyrian_remake.md)** (Java, GPL-2.0, beta)
- **[Uebergame](../uebergame.md)** (TorqueScript, C#, MIT, mature)
- **[Unvanquished](../unvanquished.md)** (C, C++, GPL-3.0, mature)
- **[Virus Attack](../virus_attack.md)** (Java, AGPL-3.0, mature)
- **[Vorton](../vorton.md)** (C, GPL-3.0, beta, inactive since 2004)
- **[WitchavenGDX](../witchavengdx.md)** (Java, Custom, beta)
- **[Wolf3dX](../wolf3dx.md)** (C#, GPL-2.0, beta)
- **[Word War vi](../word_war_vi.md)** (C, GPL-2.0, mature)
- **[X-Moto](../x-moto.md)** (C++, GPL-2.0, mature, inactive since 2014)
- **[xdigger](../xdigger.md)** (C, GPL-2.0, mature, inactive since 1999)
- **[Xonotic](../xonotic.md)** (C, C++, GPL-3.0, mature)
- **[XPilot NG](../xpilot_ng.md)** (C, GPL-2.0, mature, inactive since 2010)
- **[XPilot](../xpilot.md)** (C, C++, GPL-2.0, mature, inactive since 2010)
- **[Yamagi Quake II](../yamagi_quake_ii.md)** (C, GPL-2.0, mature)
- **[Yet Another Doom Clone](../yet_another_doom_clone.md)** (JavaScript, Python, GPL-3.0, mature)
- **[Yo Frankie!](../yo_frankie.md)** (Blender Script, ?, mature, inactive since 2009)
- **[Zandronum](../zandronum.md)** (C, Custom, mature, inactive since 2017)
- **[Zatacka X](../zatacka_x.md)** (C, GPL-3.0, beta)
- **[Zauberer](../zauberer.md)** (None, ISC, beta, inactive since 2018)
- **[Zero Ballistics](../zero_ballistics.md)** (C++, MIT, mature, inactive since 2013)