Homepages: www.descent2.de, d2x-xl
Inspirations: Descent, Descent II
Developers: Aus-RED-5, Ian Taylor, karx11erx, Sirius

Homepage: www.astrolog.org/labyrnth/daedalus.htm

Homepage: www.dfworkshop.net
Inspiration: The Elder Scrolls II: Daggerfall
Download: Interkarma/daggerfall-unity/releases
Developers: Allofich, Andy B, Andy Blower, BadLuckBurt, bansheexyz, Ben, DFIronman, Dominik Madarász, electrorobobody, Etienne, Ferital, Galactic Chimp, Gavin Clayton, GethN7, ifkopifko, Jay_H, JayH2971, Joris van Eijden, Josh Steinhauer, Justin Steele, Kirill Smirnov, Kévin Alexandre Boissonneault, l3lessed, Lypyl, Matt, midopa, Mike B., murderbeard, numidium, Nystul-the-Magician, Paolo, Pierre Etchemaïté, Ralzar81, TheLacus, XJDHDR

Homepages: www.daimonin.org, daimonin
Media: Daimonin
Download: www.daimonin.org/downloads
Developers: Alderan, Andreas, Andreas Kirschbaum, Anich, Ankit Sangwan, Arnim Sauerbier, Björn Axelsson, Carter Tomlenovich, Christian Hujer, Clobber, Cole Seeley, DarK AvengeR, elwin013, franklinb, Grunt, Jeff Goodenough, joeshmo, John Smith, larry northup, Marlon Hunter, Michael Toennies, Mysteria, Myths, nicetuna, red, Simon ''the Sorcerer'', smacky, Stuart, Tom, Torchwood, Unislash, Václav Müller

Homepages: dangerdeep.sourceforge.net, dangerdeep
Inspiration: Silent Hunter 4
Downloads: dangerdeep.sourceforge.net/downloads, dangerdeep/files
Developers: LuisB, Matthew L, Olivier H, Thorsten Jordan

Homepages: www.darkdestiny.at, www.thedarkdestiny.at/portalApp/#, darkdestiny
Developers: Albrecht Vogt, Ciannicay, Craft4, DesertRatX, Martin Tschöpe, ThoHai, Zhdophanti

Homepages: dark-oberon.sourceforge.net, dark-oberon
Inspiration: Warcraft II
Download: dark-oberon.sourceforge.net/?page=download
Developers: Leon Vayman, Marian Cerny, Peter Knut, philippe lhardy

Homepage: darkcity
Download: darkcity/files
Developers: DarkCity, Philippe Bousquet, Thierry Bousquet

Homepage: icculus.org/twilight/darkplaces
Inspiration: Quake
Download: icculus.org/twilight/darkplaces/download.html
Developers: David Knapp, divVerent

Homepage: haroldo-ok/datastorm
Inspiration: Turmoil
Developer: Haroldo de Oliveira Pinheiro

Homepages: djoffe.com/gnukem, gnukem
Inspiration: Duke Nukem
Download: gnukem/files/gnukem
Developers: David Joffe, Evil Mr Henry

Homepage: iamCode/Dawn/wiki

Homepage: ddnet.tw
Inspiration: Teeworlds
Download: ddnet.tw/downloads

Homepage: Archive: 20070711231311/http://www.robsons.org.uk/archive/www.autismuk.freeserve.co.uk/index.htm
Inspiration: Deathchase

Homepages: Archive: 20110926115405/http://www10.caro.net:80/dsi/decker, decker
Download: decker/files
Developers: Bence Dobos, David Barnett, Gonzalo Bianchi, Jeremy Reeves, Lexaeus, Michael John Marsh, Shawn Overcash, Vasilij Savin, Will Sommer, zyphrus

Homepage: devcarpet.net/deerportal
Developers: Katia Zawadzka, rafalon, Rafał Zawadzki, ukata

Homepage: www.newbreedsoftware.com/defendguin
Inspiration: Defender
Downloads: www.newbreedsoftware.com/defendguin/download, ftp://ftp.tuxpaint.org/unix/x/defendguin

Homepage: HassanHeydariNasab/defendo
Download: f-droid.org//packages/ir.hsn6.defendo
Developer: Hasan Hejdari Nasab

Homepage: delaford/game.
Developers: agitperson, Ben Sumser, Dan Jasnowski, erezvish, Steve Richter

Homepage: www.deliantra.net/index.html
Download: www.deliantra.net/play.html

Homepage: Interrupt/delverengine
Inspiration: Delver
Developers: Chad Cuddigan, Felix Siebeneicker, jazz mickle, Jeff, Joshua Skelton

Homepage: MattMatt0240/DemiGod

Homepages: cosp, Archive: 20210213180047/https://sites.google.com/site/vascocosta/theclue
Inspiration: The Clue!
Download: cosp/files
Developers: Felipe Gerhard, Kaweh Kazemi, Lucas Schaller, Oliver Gantert, Philipp Gühring, Ronny Thiemann, saschak, Thomas Trummer, Vasco Alexandre da Silva Costa

Homepage: shinyquagsire23/DesktopAdventures
Inspirations: Indiana Jones and his Desktop Adventures, Star Wars: Yoda Stories
Developer: Max Thomas

Homepages: MovingBlocks/DestinationSol, destinationsol.org, destinationsol
Download: destinationsol.org/download
Developers: Adam, AndyTechGuy, Arpit Kamboj, Avalancs, BenjaminAmos, Dejan Petrović, IsaacLic, Isaiah Blanks, Jindřich Dítě, Linus van Elswijk, Malanius Privierre, Milosh Petrov, Mpcs, Nail Khanipov, Nicholas Bates, Nika Burimenko, oniatus, PrivateAlpha, Rasmus Praestholm, Ronald Blake, Rostyslav Zatserkovnyi, Rulasmur, Sigma-One, Simon Crutchley, TheGhostInTheMachine, Tobias, Todd Chavez, vampcat, Zachary Pendarvis, Zweihander 101

Homepages: Archive: 20180419021717/http://devana.eu, devana
Download: devana/files
Developer: devland

Homepage: diasurgical/devilution
Inspiration: Diablo
Developers: Adam Heinermann, Adam Stachowicz, Anders Jenbo, Andi, BorisTheBrave, Dennis Duda, Gleb Mazovetskiy, Joan Karadimov, JustAnotherGuid, Manuel K, Marco, nomdenom, qndel, Robin, Sergey Semushin, squidcc

Homepages: diasurgical/devilutionX, Archive: 20130602191141/http://iphone.keyvisuals.com/apps/doom-classic-for-iphone-source-code-available
Inspiration: Diablo
Developers: 4aron5un, AAS, Adam Heinermann, Adam Stachowicz, Alex Sweet, Anders Jenbo, Andi, Andrew James, ApertureSecurity, BC Ko, Benny, Benny Franco Dennis, BorisTheBrave, Chance4us, danie1kr, Dennis Duda, Epifanov Ivan, FluffyQuack, Gianluca Boiano, Gleb Mazovetskiy, gogogogi, Grigory Sokolov, Guillaume Roche, Joan Karadimov, John Törnblom, Jonathan Mercier-Ganady, Juliano Leal Goncalves, JustAnotherGuid, Karina Betzabe Romero Ulloa, Manuel K, Marcin Konicki, Marco, Marek, Marlon Beijer, Mathieu Maret, Max Desiatov, mnml, MrHuu, NikoVP, nomdenom, nsm53project, obligaron, pionere, Psojed, qndel, Robin, rsn8887, Sergey Semushin, Siddharth singh chouhan, squidcc, Stephen C. Wills, thebigMuh, Trevor Philip, Trihedraf, Trung Lê, Vladimir Olteanu, vladtepesch, Yuri Pourre, Łukasz Łapiński

Homepage: dgcor/DGEngine/wiki
Inspiration: Diablo
Developers: dgcor, dgengin

Homepage: dhewm3.org
Inspiration: Doom 3
Download: dhewm/dhewm3/releases
Developers: Daniel Gibson, Nick Andrews, Scott Wakeling, Turo Lamminen, Yamagi

Homepage: mofr/Diablerie
Inspiration: Diablo II
Developers: Alexander Egorov, PLUG13

Homepage: mitallast/diablo-js
Developer: Alexey Korchevsky

Homepage: dgcor/Diabolika
Inspiration: Diabolika 2: The Devil's Last Stand
Developer: dgcor

Homepage: blog.mezeske.com/?p=507
Inspiration: Minecraft
Developer: Evan Mezeske

Homepage: digger.org
Inspiration: Digger
Download: digger.org/download.html

Homepage: scoutshonour.com/digital
Media: Archive: 20160507142946/https://lgdb.org/game/digital_love_story

Homepages: Archive: 20161111001304/http://www.klinksoftware.com, code.google.com/archive/p/dim3
Developer: Brian Barnes

Homepage: FloppidyDingo/Dingo-Engine
Developer: FloppidyDingo

Homepage: Aminator/DirectX12GameEngine
Developer: Amin Delavar

Homepage: team--rocket.github.io/divercity
Inspirations: Micropolis, SimCity
Developers: André Röhrig, estela1, schreva91, Tom Brewe, Tony

Homepage: web.archive.org/web/20200807012818/https://decent-userna.me/php/dmomd.php
Inspirations: Final Fantasy series, Pokémon

Homepages: dnt.dnteam.org/cgi-bin/about.py, dnt
Download: dnt.dnteam.org/cgi-bin/downloads.py
Developers: Eduardo Carvalho, Farrer, Gustavo Morais, Jairo, Marcus Lima, plukich, qubodup, Rui César A. Pinho, ViviCoder

Homepage: amroibrahim/DIYDoom
Inspiration: Doom
Developer: Amro Ibrahim

Homepage: code.google.com/archive/p/dodge-android
Download: f-droid.org/de/packages/com.dozingcatsoftware.dodge

Homepages: domination.sourceforge.net, domination
Inspiration: Risk
Downloads: domination.sourceforge.net/download.shtml, domination/files
Developers: Adrien Laugueux, Steve Hawkins, Theodore Allardyce, Yura

Homepages: winterdrache.de/freeware/domino/index.html, nddomino
Developer: Matthias S. Benkmann

Homepage: plowteam/donut
Inspiration: The Simpsons: Hit & Run

Homepage: id-Software/DOOM
Inspiration: Doom

Homepages: doomlegacy.sourceforge.net, doomlegacy
Inspirations: Doom, Doom II, Heretic, Hexen
Download: doomlegacy/files
Developers: A.J. Freda, Alex Raftis, Anthony Cole, Calum Robinson, Chippo, Denis Fabrice, Dennis Meuwissen, Gabor Sebestyen, Geoff Bathauer, Jussi Pakkanen, Planky, Robert Bäuml, Sergey Cremez, Steven A. Martin, Steven McGranahan, Thierry Van Elsuwe, Trevor Primmett, Ville Bergholm, Wesley Johnson

Homepage: www.doomretro.com
Inspirations: Doom, Doom II
Download: bradharding/doomretro/releases
Developers: alexey.lysiuk, Alun Bestor, Brad Harding, David CARLIER, duganchen, Fabian Greffrath, Jason M Carlough, Jonathan Nicholas, Julia Nechaevskaya, Manuel K, Michael Francis, Roman Fomin, Roman Kalashnikov, Ryan Cook, ryan-sg

Homepages: id-Software/DOOM-iOS, Archive: 20130404071629/http://iphone.keyvisuals.com:80/apps/doom-classic-for-iphone-source-code-available
Inspirations: Doom, Doom II, Heretic, Hexen

Homepage: doom64ex.wordpress.com
Inspiration: Doom 64
Download: doom64ex.wordpress.com/downloads
Developers: alexey.lysiuk, Manuel K, Pavel Lobashov, Tatsh, Zohar Malamant

Homepages: dengine.net, deng
Inspirations: Doom, Doom II, Heretic, Hexen
Download: deng/files
Developers: Christopher Bruns, Daniel Swanson, Jaakko Keränen, Roman Hargrave

Homepages: dopewars.sourceforge.io, dopewars
Inspiration: Drugwars
Download: dopewars.sourceforge.io/download.html
Developers: Ben Webb, Ocelot Mantis

Homepage: doukutsu-rs/doukutsu-rs
Inspiration: Cave Story
Developers: alula, Khangaroo

Homepage: www.ucw.cz/draci-historie/index-en.html
Download: www.ucw.cz/draci-historie/index-en.html#download

Homepages: emhsoft.com/dh.html, savannah.nongnu.org/projects/dragon-hunt

Homepage: urxp/drally
Inspiration: Death Rally
Developer: Lius

Homepages: www.dreamchess.org, dreamchess
Downloads: www.dreamchess.org/downloads, dreamchess/files
Developers: Allan Nordhøy, Kris McAulay, Lautaro Bernabé Otaño, MrSiggler, Walter van Niftrik

Homepage: c99koder/DreamZZT
Inspiration: ZZT
Developers: aaronapgar, Sam Steele

Homepage: dreerally.com
Inspiration: Death Rally
Developer: Enrique Somolinos Pérez

Homepage: drl.chaosforge.org
Media: DRL
Inspiration: Doom
Download: drl.chaosforge.org/downloads
Developer: Kornel Kisielewicz

Homepage: alkom/droidzebra
Inspiration: Reversi
Download: f-droid.org//packages/com.shurik.droidzebra

Homepage: www.duality2d.net
Developers: Adam, Alexandre Oliveira, Andrew O'Connor, Christian Greiner, Dean Johnson, intercross21, Jared Miller, Lőrinc, Lőrinc Serfőző, Mladen Mihajlović, Rick van Dam, SirePi, tliecau

Homepage: tangramgames.dk/games/duckmarines
Inspiration: ChuChu Rocket!
Download: SimonLarsen/duckmarines/releases
Developers: Jordan Christiansen, Simon Larsen

Homepage: duckmaze
Developers: Andy Balaam, Jean-Michel Baudrey

Homepage: duelcommander
Download: duelcommander/files
Developer: Tommi Helander

Homepage: MaxwellSalmon/DUGA
Inspiration: Castle Wolfenstein
Developers: Maxwell Salmon, MaxwellSalmon

Homepage: icculus.org/duke3d
Inspiration: Duke Nukem 3D

Homepage: www.rancidmeat.com/project.php3?id=1
Inspiration: Duke Nukem 3D
Download: www.rancidmeat.com/projects/duke3d_w32/duke3d_w32_b20_src.zip

Homepage: m210.duke4.net
Inspiration: Duke Nukem 3D

Homepages: dunedynasty.sourceforge.net, dunedynasty
Inspirations: Dune 2, Open Dune
Download: dunedynasty
Developers: David, Nyerguds, s1w_

Homepage: dune2themaker.fundynamic.com
Media: Dune II - The Maker
Inspiration: Dune 2
Download: dune2themaker.fundynamic.com/releases
Developers: Arjen van der Ende, Stefan Hendriks

Homepages: dunelegacy.sourceforge.net, dunelegacy
Inspiration: Dune 2
Downloads: dunelegacy.sourceforge.net/website/downloads.html, dunelegacy/files
Developers: _Gumby, Anthony Cole, Chan Kun Wa, DunkFordyce, HarryTormey, Henric Jungheim, Jason Johnson, Martin Reichl, Oto Petrik, Per Øyvind Karlsen, Richie, RichieQ, Shannon, Shutdownrunner, Stefan van der Wel, Yellow

Homepage: www.bernardosulzbach.com/dungeon
Download: bernardosulzbach/dungeon/releases
Developers: Bernardo Sulzbach, Paul Luu

Homepages: uaf.sourceforge.net, uaf, www.dianneandpaul.net/UAF/DungeonCraft.html
Inspiration: Forgotten Realms: Unlimited Adventures
Download: uaf/files
Developers: LurchBrick, manikus, nologgie, Paul R. Stevens, Paul Stevens, Richard Turner, Tarlanon

Homepage: crawl.develz.org
Inspiration: Linley's Dungeon Crawl
Download: crawl.develz.org/download.htm
Developers: 4Hooves2Appendages, Aaron Becker, Aaron Golden, Aaron Olowin, abrahamwl, Adam Borowski, AdamPG, Adrienne Walker, Aidan Holm, Alan Malloy, Alex Jurkiewicz, Allspice, amcnicky, arcee1986, ariaB, Benjamin S Wolf, Benoit Giannangeli, bjobae, Brendan Hickey, bstrie, ByrelMitchell, CanOfWorms, caotto, cbuchananhowland, Cedor, Chris Honey, Chris Oelmueller, cut1less, Cyprian Gascoigne, DarkTwinge, Darshan Shaligram, DMB, Doesnty, Dom Light, dpeg, dplusplus, DrKe, Edgar A. Bering IV, Eino Keskitalo, Elan Morin Tedronai, Elliot Dronebarger, elliptic, Emily, Evan Shaw, felirx, floatingatoll, Floodkiller, floraline, Florian Diebold, frogbotherer, Gabriel Marks, GafrieGithub, gammafunk, Glenn Matthews, Goratrix, Gustaf Hallberg, Hellmonk, hellmonk3, Hurcan Solter, Implojin, Isaac Sloat, James Meickle, Jesse Luehrs, jmbjr, Johannes Maier, John Stahara, John Stilley, Jon Knapp, Josh Braden, Josh Gelbard, Kate, KennySheep, Kyle Fox, Kyle Rawlins, Larpico, Lothar Dierkes, luca-barbieri, mainiacjoe, Mark Lodato, marksg07, Martin Aigner, mgdelmonte, Michael Gagno, Mikko Vepsäläinen, Mindcrafter, minqmay, MorganLeah, Naruni-Crawl, Nathan Mills, Neil Moore, Nicholas Feinberg, Nicholas Smith, nicolae-carpathia, nikheizen, nlavsky, NormalPerson7, nrook, nrook-google, PabloMansanet, Pekka Lampila, Peter Wicks Stringfield, pubby, qoala, Raphaël Langella, RBrandon, Reid Barton, RJ Cunningham, rlund2, Robert, Robert Burnham, roctavian, RojjaCebolla, Rolf K, Ryan Riegel, Samuel Bronson, Samuel Wilson, Sandman25DCSS, sdynet, SeveMonahan, sgrunt, Shmuale Mark, Skrybe, sorear, stahara, Stenella, Steven Noonan, Taylor M. Hedberg, ufshaikh, Wensleydale, wjchen, www, Yer mivvaggah, Zhang Kai

Homepage: www.dungeoneye.net
Inspiration: Eye of the Beholder II: The Legend of Darkmoon
Developer: Iliak

Homepage: guillaume-gouchon/dungeonhero
Download: play.google.com/store/apps/details?id=com.glevel.dungeonhero
Developer: Guillaume

Homepage: jwvhewitt/dmeternal
Developers: Joseph Hewitt, jwvhewitt

Homepage: dmonkey
Download: dmonkey/files
Developer: Joseph Hewitt

Homepage: guillaume-gouchon/dungeonquest
Developer: Guillaume

Homepage: www.driver-aces.com/ronnie.html#dunnet
Media: Dunnet
Developer: Ron Schnell

Homepage: juzzlin.github.io/DustRacing2D/index.html
Inspiration: Micro Machines
Download: juzzlin/DustRacing2D/releases
Developers: Jussi Lind, Pino Toscano, Wuzzy

Homepage: www.dwarfcorp.com
Inspirations: Dwarf Fortress, Minecraft
Developers: Chris Cajas, Daniel Roethlisberger, Makeshiftrobot, Matthew Klingensmith, Solsund, Yueran (Aaron) Yuan

Homepage: www.dxx-rebirth.com
Inspirations: Descent, Descent II
Download: www.dxx-rebirth.com/download-dxx-rebirth
Developers: AlumiuN, Arne de Bruijn, Bradley Bell, C.W. Betts, Christian, Dave Milici, derhass, dimag0g, JP Cimalando, kreatordxx, Kreeblah, Mako88, Martin Fiedler, Ronald M. Clifford, SanskritFritz, SkywingvL, vLKp, Volker Schneider, ziplantil

Homepage: akien-mga/dynadungeons
Inspiration: Bomberman
Developers: deliciousfudge, Rémi Verschelde