| class="wikitable sortable" style="text-align: center;" |
| Title
!First release
!Latest release
!Genre
!Engine license
!Content license
!Dimensions
!Other information
!Programming language |
|---|
| 0 A.D.
|2009
|2025
|RTS
|GPL-2.0-or-later
|CC BY-SA 3.0
|3D
|Historical, cross-platform RTS, using an original engine named Pyrogenesis. Game source-code released July 10, 2009.[{{cite web|url=http://os.wildfiregames.com/|title=0 A.D. Open Source Release|work=wildfiregames.com}}]
|C++, JavaScript, GLSL |
| 2048
|2014
|2014
|Puzzle
|MIT
|MIT
|2D
|A sliding block puzzle game.
|Ruby, JavaScript, HTML, CSS |
| A Dark Room
|2013
|2023
|Online text-based role-playing game
|Mozilla Public License
|Mozilla Public License
|Text
|In July 2013 the source code of the game was put on GitHub under MPL 2.0.[[http://blog.doublespeakgames.com/news/a-dark-room-goes-open-source/ A Dark Room goes open source] {{webarchive|url=https://web.archive.org/web/20150907210142/http://blog.doublespeakgames.com/news/a-dark-room-goes-open-source/ |date=2015-09-07 }} on doublespeakgames.com (July 3, 2013)] Became commercially successful after the source code release.
|Python, JavaScript, HTML, CSS |
| Abuse
|1996
|2011
|Run and gun
|Public-domain software
|Public domain
|2D
|
|C, C++, newLISP, CMake, Common Lisp |
| Argentum Online
|1999
|2018
|MMORPG
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|First open-source MMORPG developed in Argentina.{{Citation needed|date=March 2019}}
|Visual Basic, VBA, JavaScript, C++, HTML |
| Armagetron Advanced
|2001
|2024
|Racing
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|A multiplayer 3D Tron lightcycle racing game.
|C++ |
| AstroMenace
|2007
|2025
|Arcade
|GPL-3.0-or-later
|GPL-3.0-or-later, CC BY-SA 4.0
|3D
|A top-scrolling space shooter.
|C, C++ |
| Ballerburg
|1987
|2008 (ports)
|Artillery game
|Public-domain software
|Public domain
|2D
|Public-domain software on the author's website with source code.[[http://www.eckhardkruse.net/atari_st/baller.html April 1987: Ballerburg - Zwei Spieler, zwei Burgen und ein Berg dazwischen...] on eckhardkruse.net "Ich habe das Programm als Public Domain veröffentlicht" (in German)] Later ported to other systems such as Linux, MacOS, iOS, etc.
| |
| The Battle for Wesnoth
|2005
|2025
|TBТ
|GPL-2.0-or-later
|GPL-2.0-or-later, CC BY-SA 4.0
|2D
|Turn-based tactical strategy game with RPG elements. Includes a single-player campaign and skirmish modes as well as multiplayer.
| C++, Lua, Python |
| Biniax
|2005
|2012
|Puzzle
|zlib
|zlib
|2D
|
| |
| Bos Wars
|2004
|2013
|RTS
|GPL-2.0-or-later
|GPL-2.0-or-later
|Isometric 2D
|2D real-time strategy game running on a modified version of the Stratagus engine.
| |
| BZFlag
|1997
|2022
|Tank FPS
|LGPL-2.1-only and MPL-2.0
|LGPL-2.1-only and MPL-2.0
|3D
|A first-person shooter 3D tank-based multiplayer online game.
| |
| C-Dogs SDL
|2002
|2025
|Run and gun
|Public-domain software {{Small|(engine)}} / GPL-2.0-or-later {{Small|(game code)}}
|CC0, CC BY, CC BY-SA
|2D
|Overhead run-and-gun, with hotseat cooperative and deathmatch play for up to four players.
| |
| Cart Life
|2011
|2017
|Simulation
|Cart Life's Free License (permissive license)
|Cart Life's Free License (permissive license), Freeware
|2D
|In March 2014 the source code and game was made available by Richard Hofmeier for free online, saying he was finished supporting the game.[{{cite web |url=http://www.pcgamer.com/uk/2014/03/20/cart-life-open-source/ |title=Cart Life exits Steam, goes open source |date= 20 March 2014 |access-date=21 March 2014 |first=Omri |last=Petitte |work= PC Gamer}}][[https://www.dropbox.com/s/v2uu2cdonh3swxz/cartlife_opensores.zip cartlife_opensores.zip] on the author's dropbox] Winner of the IGF 2013 award.[{{cite web|url=http://igf.com/2013/03/gdc_2013_cart_.html|title=The 17th Annual Independent Games Festival|work=igf.com|date=2013-03-28}}] Mirrored on GitHub.[[https://github.com/gondur/cartlife_src cartlife_src]]
| |
| Cataclysm: Dark Days Ahead
|2013
|2023
|RPG/Roguelike
|CC BY-SA 3.0
|CC BY-SA 3.0
|2D
|A post-apocalyptic survival roguelike with open-ended gameplay. Financed by a successful crowdfunding campaign on kickstarter.com on 22 June 2013.[{{cite web|url=http://www.kickstarter.com/projects/568375735/cataclysm-dark-days-ahead-dedicated-developer/|title=Cataclysm: Dark Days Ahead - Dedicated Developer|work=Kickstarter|date=22 June 2013}}]
| |
| Chromium B.S.U.
|2000
|2016
|Arcade
|Clarified Artistic
|MIT
|2D
|A fast-paced arcade-style top-scrolling space shooter.
| |
| Colobot
|2001
|2021
|RTS, educational
|GPL-3.0-or-later
|GPL-3.0-or-later
|3D
|Source code of the original game by EPSITEC SA was released in March 2012.[{{in lang|pl}} [http://www.colobot.cba.pl/news.php?readmore=19 Announcement on Polish Portal of Colobot] {{webarchive|url=https://web.archive.org/web/20120807154006/http://www.colobot.cba.pl/news.php?readmore=19 |date=2012-08-07 }}][[https://colobot.info/wordpress/wp-content/uploads/license.jpg Original Colobot source code release license]] Since then, the game is maintained by the community as Colobot: Gold Edition.[[https://github.com/colobot/colobot/blob/master/README.md#status Colobot: Gold Edition README]]
| |
| Colossal Cave Adventure
|1976
|1995
|Text adventure
|Public-domain software[{{cite web |url=http://jerz.setonhill.edu/if/canon/Adventure.htm |title=Colossal Cave Adventure |access-date=2007-09-07 |work=Seton Hill University |last=Jerz |first=D.G.}}]
|Public domain
|Text
|The original text adventure game by Crowther and Woods.
| |
| Core War
|1984
|1984
|Programming game
|Various (public domain, BSD, GPL)[[https://sourceforge.net/projects/corewar/ corewar] on SourceForge]
|Various
|Text
|Original created by D. G. Jones and A. K. Dewdney, and continued through the present day by the community.
| |
| Crossfire
|1992
|2019
|MMORPG
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Crossfire originally started as a Gauntlet clone[{{Cite FTP |url=ftp://ftp.ifi.uio.no/pub/crossfire/historic |server=ftp.ifi.uio.no |url-status=dead |title=FTP link }}] developed by Frank Tore Johansen at the University of Oslo, Norway.[{{cite web|url=http://archives.real-time.com/rte-crossfire/1999/Sep/msg00022.html|title=Re: CF: the {{sic|begi|ning|nolink=y}} of crossfire|work=real-time.com|access-date=2013-04-27|archive-url=https://web.archive.org/web/20070404101353/http://archives.real-time.com/rte-crossfire/1999/Sep/msg00022.html|archive-date=2007-04-04|url-status=dead}}]
| |
| DDraceNetwork
|2013
|2024
|Platformer
|zlib
|CC BY-SA 3.0 (except font)
|2D
|2D online multiplayer side-scrolling co-op platformer.
|C++ |
| Diamond Trust of London
|2012
|2012
|TBS
|Public-domain software
|Public domain
|2D
|Following a Kickstarter crowdfunding campaign, Diamond Trust of London was developed by Jason Rohrer and published by indiePub. On August 28, 2012, it was released for the Nintendo DS. The game has been placed in the public domain, hosted on SourceForge, like most of Rohrer's games.[{{cite web| url=http://sourceforge.net/p/hcsoftware/DiamondTrust/ci/default/tree/ |title=DiamondTrust/ci/default/tree |first=Jason|last=Rohrer| website=SourceForge| date=2011-10-17| access-date=2013-05-22|author-link=Jason Rohrer }}]
| |
| DRL
|2013
|2016
|Roguelike
|GPL-2.0-or-later | CC BY-SA 4.0
|2.5D
|Based on Doom and Doom II.
| |
| Duelyst
|2016
|2023
|Collectible card game
|CC0
|CC0
|2D
|Built using nodeJS, open source release in 2023.[{{Cite news |author1=Andy Chalk |date=2023-01-10 |title=Duelyst source code is now free for everyone, 'no strings attached' |url=https://www.pcgamer.com/duelyst-source-code-is-now-free-for-everyone-no-strings-attached/ |access-date=2025-02-12 |work=PC Gamer |language=en}}]
| |
| Dungeon Crawl Stone Soup
|2006
|2023
|Roguelike
|GPL-2.0-or-later
|CC0
|2D
|An open-source fork of the 1997 game Linley's Dungeon Crawl.
| |
| Endgame: Singularity
|2005
|2020
|Science fiction/AI simulation game
|GPL-2.0-or-later
|CC BY-SA 3.0
|2D
|Written in Python by EMH, later continued by the community.[[https://github.com/singularity/singularity singularity] on github.com]
| |
| Endless Sky
|2015[{{Cite web |title=Releases · endless-sky/endless-sky |url=https://github.com/endless-sky/endless-sky/releases |access-date=2023-10-24 |website=GitHub |language=en}}]
|2025
|Space trading and combat simulator[{{Citation |title=Endless Sky |date=2023-10-23 |url=https://github.com/endless-sky/endless-sky |access-date=2023-10-24 |publisher=Endless Sky}}]
|GPL-3
|Public domain, various CC licenses
|2D
|Inspired by the Escape Velocity series of games. Continuously updated.
|C++ |
| Enigma
|2003
|2021
|Puzzle
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Oxyd clone.
| |
| Fish Fillets NG
|2004
|2011
|Puzzle
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Released commercially as Fish Fillets in 1998. Source released in 2002 under GPL-2.0-or-later.
| |
| FlightGear
|1997
|2023
|Flight sim
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Microsoft Flight Simulator-inspired clone.
| |
| Freeciv
|1996
|2023
|TBS
|GPL-2.0-or-later
|GPL-2.0-or-later
|Isometric 2D
|Civilization II clone.
| |
| FreeCol
|2003
|2023
|TBS
|GPL-2.0-or-later
|GPL-2.0-or-later
|Isometric 2D
|Sid Meier's Colonization clone.
| |
| FreeDink
|2006
|2019
|RPG
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|Dink Smallwood fork with non-free assets replaced with free ones
|C++ |
| Friday Night Funkin'
|2020
|2025
|Rhythm
|MIT License {{Small|(engine)}} / Apache License 2.0 {{Small|(game)}}
|Apache License 2.0 (may be non-commercial[{{Cite tweet |last=Taylor |first=Cameron |author-link= |user=ninja_muffin99 |number=1371273787472248832 |date=14 March 2021 |title=By default we made Friday Night Funkin, so we automatically get copyright protection. The game is open source, but that only covers like the actual code. The assets are in a state where we cool if people use it in fanstuff, but it gets iffy when people [are trying] to make money |script-title= |trans-title= |language= |retweet= |location= |access-date=10 April 2021 |link= |url-status=live |archive-url=https://web.archive.org/web/20210315013539/https://twitter.com/ninja_muffin99/status/1371273787472248832 |archive-date=15 March 2021 |ref=}}])
|2D
|A bi-dimensional rhythm game, with gameplay reminiscent of Dance Dance Revolution and aesthetics reminiscent of early-to-mid-2000s browser games.
|Haxe |
| Frozen Bubble
|2002
|2008
|Puzzle
|GPL-2.0-only
|GPL-2.0-only
|2D
|Puzzle Bobble clone.
| |
| Gang Garrison 2
|2008
|2019
|Shooter
|Proprietary {{Small|(engine)}} / MPLv2 {{Small|(game code)}}
|MPLv2
|2D
|A retro "demake" of Team Fortress 2. The project was previously under GPLv3.
| |
| Glest
|2004
|2008
|RTS
|GPL-3.0-or-later
|CC BY-SA 3.0
|3D
|3D real-time strategy game with two factions, AI, and same-platform networking support. Development ceased in 2008. Two forks exist, named MegaGlest and Glest Advanced Engine.
| |
| Globulation 2
|2008
|2009
|RTS
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|In open beta as of 2019.
| |
| GLtron
|2003
|2016
|Racing
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Based on the light cycle portion of the film Tron.
| |
| GNOME Games
|1997
|2021
|Various
|GPL-3.0-or-later
|GPL-3.0-or-later
|
|A collection of games accompanying the rest of the GNOME desktop environment.
| |
| GNU Chess
|1984
|2021
|TBS
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|Chess-playing engine developed by the GNU Project.
| |
| GNU Go
|1999
|2009
|TBS
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|Go-playing engine developed by the GNU Project.
| |
| Hunt the Wumpus
|1973
|1981
|Survival horror/adventure/puzzle
|Various (Public-domain software,[{{Cite book |url=https://www.worldcat.org/oclc/2188876 |title=The Best of Creative computing |date=1978 |isbn=0-916688-01-1 |editor-last=Ahl |editor-first=David H. |location=Morristown, N.J. |oclc=2188876 |editor-last2=Green |editor-first2=Burchenal}}] GPLv2,[{{Cite web|title=Hunt the Wumpus|url=https://www.codeproject.com/Articles/786118/Hunt-the-Wumpus|access-date=2020-11-06|website=www.codeproject.com|date=14 June 2014|language=en-US}}] MIT)[{{Citation|last=Lovy|first=Ben|title=deciduously/hunt-the-wumpus|date=2020-05-28|url=https://github.com/deciduously/hunt-the-wumpus|access-date=2020-11-06}}]
|Various (Public-domain software,
|2D
|Hunting a monster called Wumpus while moving through caves.
| |
| HyperRogue
|2011
|2021
|Puzzle/Roguelike/Educational
|GPL-2.0-or-later
|GPL-2.0-or-later
|Hyperbolic
|Puzzle roguelike in the hyperbolic plane.
| |
| kiki the nano bot
|2003
|2007
|Puzzle
|Public-domain software
|Public domain
|3D
|Mixture of Sokoban and Kula World.
| |
| Lincity
|1999
|2013
|City-building game
|GPL-2.0-only
|GPL-2.0-only | 2.5D
|SimCity clone.
| |
| Liquid War
|1995
|2015
|Maze games
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|2D game in which you control particles and move them to defeat the opposing side.
| |
| Luanti (formerly Minetest)
|2010
|2024
|Sandbox, survival
|zlib {{Small|(engine)}} / LGPL-2.1-or-later[{{cite web|url=https://github.com/minetest/minetest/blob/master/LICENSE.txt|title=LICENSE.txt|website=GitHub|date=October 25, 2021}}] {{Small|(game code)}}
|LGPL-2.1-or-later
|3D
|A voxel engine for building games similar to Infiniminer and Minecraft.
| |
| Lugaru
|2005
|2017
|Action/third-person shooter
|GPL-2.0-or-later
|CC BY-SA[{{cite web |url=https://gitlab.com/osslugaru/lugaru |title=Lugaru HD |access-date=14 January 2017 | website=Gitlab}}]
|3D
|A game by Wolfire Games where the player is an anthropomorphic rabbit who seeks revenge when a group of enemy rabbits kill their family.
| |
| Maelstrom
|1992
|2010
|Shoot 'em up
|GPL-2.0-only
|CC BY 3.0
|2D
|
| |
| Mari0
|2012
|2018
|Platformer
|zlib License {{Small|(engine)}} / MIT License {{Small|(game code)}}
|MIT
|2D
|Remake of Super Mario Bros. with elements from Portal.
| |
| MegaGlest
|2010
|2016
|RTS
|GPL-3.0-or-later
|CC BY-SA 3.0
|3D
|Cross-platform 3D real-time strategy game for up to eight players (can be AI-controlled) on seven factions. MegaGlest is a fork of Glest.
| |
| Meridian 59
|1996
|2024
|MMORPG
|GPL-2.0-only
|GPL-2.0-only
|2.5D
|Free MMORPG where you fight alongside friends, side with powerful factions, and explore diverse environments.
|C, C++ |
| Mindustry
|2017
|2023
|RTS,
TD,sandbox
|GPL-3.0
|GPL-3.0
|3D
|The automation tower defense RTS, written in Java.
| |
| Moria
|1983
|1999
|RPG/Roguelike
|GPL-2.0-only[{{cite web|url=http://umoria.org |title=Umoria - The Classic Roguelike Dungeon Crawler |access-date=2021-04-15}}][{{cite web|url=http://free-moria.sourceforge.net/ |title=free-moria |access-date=2009-04-04}}]
|GPL-2.0-only
|2D
|Roguelike RPG based heavily on J. R. R. Tolkien's novel The Lord of the Rings.
| |
| NetHack
|1987
|2023
|RPG/Roguelike
|NetHack GPL
|NetHack GPL
|Text
|Single-player dungeon exploration game.
| |
| Netrek
|1988
|2020[{{cite web |url=https://github.com/quozl/netrek-client-cow/tags |title=Netrek Client (C and X11) |date=2020-05-16 |website=Github project page |access-date=2022-02-19}}]
|Shoot 'em up
|MIT
|MIT
|2D
|A successor to 1986's Xtrek, Netrek was first played in 1988. It was the third Internet game, the first Internet team game, and as of 2022 is the oldest Internet game still actively played.
| |
| Nexuiz
|2005
|2009
|FPS
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Forked into Xonotic.
| |
| NoGravity
|1997 (?)
|2005
|Space shooter
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Source code of the Wing Commander-inspired game released by realtech VR on February 16, 2005.[[http://sourceforge.net/projects/nogravity/?source=navbar No Gravity (Classic)] on sourceforge.net]
| |
| One Hour One Life
|2018
|2023
|Survival
|Public domain
|Public domain
|2D
|Multiplayer co-op survival game.
| |
| Oolite
|2006
|2020
|Space sim
|GPL-2.0-or-later
|Dual-licensed under GPL-2.0-or-later and CC BY-NC-SA-3.0
|3D
|Elite clone.
| |
| OpenArena
|2005
|2012
|FPS
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Quake III clone.
| |
| OpenCity
|2003
|2008
|City-building game
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|SimCity clone.
| |
| OpenClonk
|2010
|2018
|Action, platform
|ISC
|CC BY
|2D
|Successor of the Clonk shareware series.
| |
| OpenTTD
|2005
|2024
|Business sim
|GPL-2-0-only
|GPL-2-0-only, GPL-2-0-or-later, CC BY-SA 3.0, CDDL 1.1
|2D
|Open-source clone of Transport Tycoon Deluxe.
| |
| Passage
|2007
|2007
|Side-scroller
|Public-domain software
|Public domain
|2D
|In 2007 Rohrer released the game's source code and assets into the public domain,[[http://hcsoftware.sourceforge.net/jason-rohrer/supportMyWork.php supportMyWork] on hcsoftware.sourceforge.net "I release all of the source code that I write as free software (free as in "freedom") into the public domain" (accessed 2016)] while asking for donations (donationware) and selling the iOS version for $0.99.[[https://web.archive.org/web/20100216232527/http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=300702040&mt=8 Passage] on itunes.apple.com]
| |
| Pingus
|1998
|2011
|Puzzle
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|Lemmings clone.
| |
| Pinball Construction Set
|1982
|1983
|Pinball, game creation system
|MIT
|MIT
|2D
|First construction set video game, and one of the initial Electronic Arts releases.
| |
| Pioneer
|2006
|2023
|Space sim
|GPL-3.0-only
|CC BY-SA
|3D
|Inspired by Frontier: Elite 2.
| |
| PokerTH
|2006
|2017
|Card
|AGPL-3.0-or-later
|AGPL-3.0-or-later
|2D
|Open-source virtual poker game.
| |
| Red Eclipse
|2011
|2019
|FPS
|zlib license
|CC BY-SA
|3D
|A fork of Cube 2: Sauerbraten, with improved graphics and a style of play that incorporates parkour movement.
| |
| Rigs of Rods
|2005
|2022
|Vehicle sim
|GPL-3.0-or-later
|GPL-3.0-or-later
|3D
|Rigs of Rods was initially created as an off-road truck simulator, but has developed into a versatile physics sandbox.
| |
| Rocks'n'Diamonds
|1995
|2018
|Puzzle
|GPL-2.0-only
|GPL-2.0-only
|2D
|A scrolling tile-based computer puzzle game that can be described as a combined Boulder Dash, Supaplex, Emerald Mine, and Sokoban clone.
| |
| ROTA
|2022
|2025
|Puzzle platformer
|MIT License {{Small|(engine)}} / Public domain {{Small|(game code)}}
|Public domain
|2D
|A platformer game where the player rotates the world to solve puzzles.
|GDScript |
| Ryzom
|2004
|2024
|MMORPG
|AGPL-3.0-or-later
|CC BY-SA 3.0
|3D
|All textures and effects, 3D models, animations, characters and clothing (no music or sounds) are under CC BY-SA.
| |
| Scorched 3D
|2001
|2014
|Artillery game
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Clone of Scorched Earth.
| |
| Secret Maryo Chronicles
|2003
|2014
|Platformer
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|2D platformer inspired by the Super Mario series.
| |
| The Secret Chronicles of Dr. M.
|2017
|2020
|Platformer
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|2D platformer inspired by the Super Mario series.
| |
| Seven Kingdoms
|1997
|2017
|RTS
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Source code released in 2009.
| |
| Shattered Pixel Dungeon
|2014
|2024
|Rogue-like game
|GPL-3.0-or-later
|Java
|2D
|Rogue-Like game with procedurally generated levels and a storyline.
| |
| Simutrans
|1997
|2025
|Business sim
|Artistic
|Artistic
|2D
|Similar to Transport Tycoon and its open-source clone OpenTTD. The player must build a profitable transportation system.
| |
| Sintel The Game
|2012
|2012
|RPG
|GPL
|CC BY, GPL
|3D
|A game based on the Blender Foundation movie Sintel.
| |
| Soldat
|2002
|2020
|Action
|MIT license
|CC BY 4.0[[https://github.com/Soldat/base/commit/02b87a8f082e8d510f9aee5bd8ca71e92fd49842 Soldat asset license] on github.com]
|2D
|On May 26, 2020, the source code of Soldat was released under MIT license on GitHub.[[https://github.com/Soldat/soldat soldat] on github.com]
| |
| Sopwith
|1984
|2014
|Shoot 'em up
|GPL
|GPL
|2D
|The C and x86 assembly source code to Sopwith was released in 2000,[{{cite web | url = http://tech.groups.yahoo.com/group/sopwith/message/27 | archive-url = https://archive.today/20120718082412/http://tech.groups.yahoo.com/group/sopwith/message/27 | url-status = dead | archive-date = July 18, 2012 | title = Sopwith Code Support | access-date = 2006-12-01 | last = Clark | first = Dave | date = 2000-10-29 }}] at first under a non-commercial use license, but later under the GNU GPL at the request of fans.[{{cite web | url = http://www.davidlclark.com/index.html?http://www.davidlclark.com/sopwith/sourcecode.html | title = Sopwith – Source Code | access-date = 2006-12-01 | last = Clark | first = Dave | work = Dave Clark's Home Page | url-status = dead | archive-url = https://archive.today/20120206011933/http://www.davidlclark.com/index.html?http://www.davidlclark.com/sopwith/sourcecode.html | archive-date = 2012-02-06 }}]
| |
| Speed Dreams
|2010
|2023
|Sim racing
|GPL-2.0-or-later
|FAL
|3D
|Forked from TORCS in late 2008.
| |
| StepMania
|2001
|2018
|Rhythm game
|MIT[{{cite web|url=https://code.google.com/p/sm-ssc/|title=stepmania/stepmania|work=GitHub|date=2019-08-26}}]
|MIT
|2D, 3D
|A DDR clone, the player must hit buttons or keys in time with the music.
| |
| SuperTux
|2003
|2021
|Platformer
|GPL-3.0-or-later
|Various
|2D
|2D platformer inspired by the Super Mario series.
| |
| SuperTuxKart
|2006
|2022
|Racing
|GPL-3.0-or-later
|Various
|3D
|Arcade racing game similar to Mario Kart.
| |
| Taisei
|2017
|2024
|Shooter
|MIT License
|CC BY-SA 4.0 / CC0-1.0
|2D
|A Manic shooter inspired by the Tōhō series.
| C |
| Teeworlds
|2007
|2020
|Platformer
|zlib
|CC BY-SA 3.0 (except font)
|2D
|2D online multiplayer side-scrolling shooter.
| |
| Tenés Empanadas Graciela
|1996
|2021
|TBS
|GPL-2-0-only
|GPL-2-0-only
|2D
|Based on the boardgame Risk.
| |
| The Castle Doctrine
|2014
|2014
|MMO
|Public-domain software
|Public domain
|2D
|A game by Jason Rohrer, developed on a SourceForge[[http://sourceforge.net/p/hcsoftware/CastleDoctrine/ci/default/tree/ CastleDoctrine] on sourceforge.net] repository and sold on Steam for $15.99.
| |
| The Powder Toy
|2010
|2023
|Sandbox game
|GPL-3.0-only
|GPL-3.0-only
|2D
|Falling-sand game.
| |
| Thrive
|2013
|2025
|God game/Life simulation game
|
|
|3D
|
| |
| Tremulous
|2006
|2009
|FPS
|GPLv2
|CC BY-SA 2.5[[https://web.archive.org/web/20080513193229/http://svn.icculus.org/tremulous/trunk/COPYING?revision=775&view=markup [tremulous] View of /trunk/COPYING]]
|3D
|Alien vs. human base-building, defending, and attacking the opposing team.
| |
| TripleA
|2002
|2020
|TBS
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|A turn-based strategy game inspired by the board game Axis & Allies. Development is ongoing.
| |
| Tux Racer
|2000
|2009
|Racing
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|A downhill slalom racing game featuring Tux, the Linux mascot.
| |
| Tux, of Math Command
|2001
|2011
|Educational game
|GPL-3.0-or-later
|GPL-3.0-or-later
|2D
|
| |
| UFO: Alien Invasion
|2006
|2016
|TBТ
|GPL-2.0-or-later
|GPL-2.0-or-later, CC BY-SA 3.0
|3D
|Inspired by the XCOM series but with 3D combat on the surface of the Earth.
| |
| UltraStar Deluxe
|2007
|2020
|Music
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|SingStar clone.
| |
| Unknown Horizons
|2008
|2019
|City-building game
|GPL-x2.0-or-later
|GPL-2.0-or-later, CC BY-SA 3.0, OFLv1
|Isometric 2D
|Genre-mix of city-building game and real-time strategy game, inspired by the Anno series.
| |
| Unvanquished
|2012
|2023
|FPS
|BSD 3-clause, GPLv3+
|CC BY-SA 2.5
|3D
|Team-based first-person shooter with strong real-time strategy elements, derived from the Tremulous project.
| |
| Vega Strike
|2008
|2022
|Space sim
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|Wing Commander: Privateer clone and space simulator engine.
| |
| Veloren
|2018
|2024
|Adventure, RPG
|GPL-3.0-or-later
|GPL-3.0-or-later
|3D, Voxel
|Open-world, open-source multiplayer voxel RPG.
|Rust |
| Warzone 2100
|1999
|2023
|RTS, RTT | GPL-2.0-or-later[{{Cite web|title=Warzone2100/warzone2100|url=https://github.com/Warzone2100/warzone2100|website=GitHub|language=en|access-date=2020-07-01}}] | GPL-2.0-or-later, CC0, other open source[{{Cite web|title=Warzone2100/warzone2100 - COPYING.NONGPL|url=https://github.com/Warzone2100/warzone2100/blob/master/COPYING.NONGPL|website=GitHub|language=en|access-date=2020-07-01}}]
|3D
|Post-apocalyptic cross-platform real-time strategy game.
| |
| Widelands
|2002
|2022
|RTS
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Widelands is a real-time strategy clone of The Settlers II.
| |
| WorldForge
|1998
|2014
|MMORPG
|GPL-3.0-or-later
|GPL-2.0-or-later
|3D
|An open-source framework for massively multiplayer online role-playing games.
| |
| Worms?
|1983
|1983
|Software toy
|MIT
|MIT
|2D
|An interactive version of Paterson's worms, and one of the initial Electronic Arts releases.
| |
| Xconq
|1987
|2005
|TBS
|GPL-2.0-or-later
|GPL-2.0-or-later
|
|4X strategy game engine.
| |
| X-Moto
|2005
|2023 | Platformer
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|Elasto Mania clone.
| |
| Xonotic
|2010
|2023 | FPS
|GPL-2.0-or-later
|GPL-2.0-or-later
|3D
|A fork and direct successor of Nexuiz. Binary files for Linux and Windows are under GPLv3+.
| |
| XPilot
|1992
|2010
|Arcade
|GPL-2.0-or-later
|GPL-2.0-or-later
|2D
|A multiplayer Asteroids-like game.
| |
| Yo Frankie!
|2008
|2009
|Action-adventure
|GPL-2.0-or-later, LGPLv2.1
|CC BY 3.0
|3D
|
| |