Commercial games with available source code
This is a list of commercial video games with available source code. The source code of these commercially developed and distributed video games is available to the public or the games' communities.
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| Cover | Title | Released | Genre | Engine license | Content license | Developer | Platforms | Source code found or leaked |
|---|---|---|---|---|---|---|---|---|
| Games with source code available on release | ||||||||
 | Akalabeth: World of Doom | 1979 | Role-playing video game | Public domain software | Freeware | Richard Garriott | Richard Garriott distributed the Applesoft BASIC written game originally as source code. Also later Origin Systems offered the source code on their FTP servers. | |
| Barkley 2 | 2021 (cancelled) | ARPG | Proprietary/CC BY-NC 4.0, (engine/game code) | CC BY-NC 4.0 | Tales of Game's Studios | Source code released to the public under no license on 11 June 2021, upon the cancellation of the game. | ||
 | Barotrauma | 2017 | Role-playing video game | restrictive (only mods) | Proprietary | Undertow Games / Joonas "Regalis" Rikkonen | The game was released in 2017 commercially on Steam by independent developer Undertow Games (Joonas "Regalis" Rikkonen). Source code was released on 4 June 2017 on GitHub under a restrictive mods allowing license. His previous game, SCP – Containment Breach, is also available as free and open-source software under CC BY-SA license. | |
 | Beneath a Steel Sky Remastered | 2009 | Adventure game | GPLv2+ | Proprietary | Revolution Software | Source code released under the GPL. | |
 | Bomb Alley | 1983 | Turn-based strategy | Proprietary | Proprietary | Strategic Simulations / Gary Grigsby | The game used the same engine used by Grigsby's previous Guadalcanal Campaign, which was coded and distributed as uncompiled Applesoft BASIC. | |
 | Diamond Trust of London | 2012 | TBS | Public domain software | Public domain | Jason Rohrer | Following a Kickstarter crowdfunding campaign Diamond Trust of London was developed by Jason Rohrer and published by indiePub. On 28 August 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. | |
 | DONKEY.BAS | 1981 | Racing game | Proprietary | Proprietary | Bill Gates, Neil Konzen | Was written by Microsoft co-founder Bill Gates and Neil Konzen in 1981 and was included with early versions of the PC DOS operating system for the original IBM PC. Similar early BASIC games which were distributed as source code are GORILLA.BAS and NIBBLES.BAS. | |
| Doom Classic | 2009 | First-person shooter | GPLv2+ | Proprietary | id Software | Source code of the iOS port released in November 2009 as it is based on the PrBoom source port. | ||
 | ELIZA (DOCTOR) | 1966 | Chatbot / Rogerian psychotherapist simulator | Public domain software / CC0 | Public domain | Joseph Weizenbaum | ELIZA is an influential video game predecessor written at the MIT Artificial Intelligence Laboratory by Joseph Weizenbaum between 1964 and 1966. Weizenbaum's original MAD-SLIP implementation was re-written in Lisp by Bernie Cosell. A BASIC version appeared in Creative Computing in 1977, written in 1973 by Jeff Shrager. This version, which was ported to many of the earliest personal computers, appears to have been subsequently translated into many other versions in many other languages. On 28 May 2021, the original MAD-Slip source code for ELIZA was discovered and released under the CC0 free-software license with permission of Weizenbaum's estate. | |
 | Frogatto & Friends | 2010 | Platform | Zlib license / CC BY 3.0 | Proprietary | Lost Pixel | The game was developed open-source on GitHub with an own open-source game engine by several The Battle for Wesnoth developers and released in July 2010 for several platforms. The game was for purchase on the MacOS' app store, iPhone App Store and BlackBerry App World as the game assets were kept proprietary. | |
 | HyperRogue | 2011 | Roguelike | GPLv2+ | Proprietary | Zeno Rogue | Released in 2011 on GitHub as open-source non-Euclidean roguelike, it was commercialized in 2015 on Steam and other distributors. | |
 | Ion Fury | 2019 | First-person shooter | GNU General Public License | Proprietary | Voidpoint | Ion Fury is based on the EDuke32 source port of Duke Nukem 3D, which is under the GNU General Public License. It is possible to compile Ion Fury by downloading the latest version of EDuke32 and compile it with the flag FURY set to 1. | |
 | Jagged Alliance 2 Wildfire (now JA2-Stracciatella) | 2004 | Tactical role-playing game | Own license | Proprietary | iDeal Games | Source code was bundled and released with JA2: Wildfire 2004. The JA: Unfinished Business source code became later available too. | |
 | Limit Theory | 2018 (canceled)/2022 | Real-time strategy | Unlicense | Unlicense | Procedural Reality | Source code released to the public due to the cancelation of the title. | |
 | One Hour One Life | 2018 | Multiplayer survival game | Public domain software | Public domain | Jason Rohrer | Released February 2018 and exclusively sold via the developer's webpage. Like the games before, public domain software and hosted on GitHub. | |
 | Pitman | 1985 | Puzzle game | Proprietary | Proprietary | Yutaka Isokawa | Originally created in 1985 on a MZ-700 home computer by Yutaka Isokawa. The BASIC listing was published in the August 1985 issue of the magazine "Oh!MZ Publications". In 1990 the game was commercially converted for the Game Boy. In 2011, the game community restored a faithful as possible version from the available variants. | |
 | Pixel Dungeon | 2014 | roguelike | GPLv3+ | Freeware/Commercial | watabou | Available commercially on Steam, while the Android release source code and original itch.io release are available for free. | |
 | Receiver | 2012 | FPS / stealth game | own non-commercial conditions | Proprietary | Wolfire games | The source code of the game is available since 2012 on GitHub under non-commercial conditions. | |
 | Santa Paravia en Fiumaccio | 1978 | turn-based strategy | Public domain software | Public domain | George Blank | The game by George Blank first appeared in the December 1978 issue of SoftSide magazine as BASIC listing. It was published for sale on tape cassette as a computer game by Instant Software for the Radio Shack TRS-80, the Apple II, TI-99/4A, and PET. It has been translated into many programming languages, such as ANSI C, and has been ported to the Palm Pilot. | |
 | Skin Deep | 2025 | First-person shooter | GPLv3+ | Proprietary | Blendo Games | Game source released on 26 June 2025, as it is based on the Dhewm3 source port. | |
 | Softporn Adventure | 1981 | Text adventure | Proprietary | Freeware | Chuck Benton / On-Line Systems | A comedic, adult-oriented text adventure game produced for the Apple II in 1981. Softporn Adventure was originally written and released for the Apple II as Applesoft BASIC source code in 1981 by programmer Chuck Benton. The game was released by On-Line Systems and became later the base for Leisure Suit Larry 1. The PC version was also released later as freeware by Al Lowe. | |
 | Strife: Veteran Edition (Strife remaster) | 2014 | FPS | GPLv2+ | Proprietary | Samuel Villarreal / Night Dive Studios | In December 2014, Night Dive Studios coordinated the re-release of the 1996 first-person shooter role playing hybrid game Strife as Strife: Veteran Edition, after acquiring rights to the game. Because the game's source code had been lost, a derivative of the Chocolate Doom subproject Chocolate Strife was used as the game's engine, with its original programmers being contracted to do additional coding for the re-release. The source code of Strife: Veteran Edition has been made available under GPLv3 on GitHub by Samuel Villarreal and Night Dive Studios on 12 December 2014. While this was the first source code opened for a Night Dive Studios Studio's game, it was announced more will follow, for instance for System Shock 1. | |
 | Quadrilateral Cowboy | 2016 | Puzzle video game | GPLv3+ | Proprietary | Blendo Games | Game source released on 8 August 2016, as it is based on the iodoom3 source port. | |
 | Telengard | 1982 | Dungeon crawler, role-playing, roguelike | Proprietary | Proprietary | Avalon Hill / Daniel Lawrence | As the game's BASIC source code ("DSKTEL.BAS") was available early on, ports and remaster exist therefore by the community. | |
 | The Castle Doctrine | 2014 | MMO | Public domain software | Public domain | Jason Rohrer | The Castle Doctrine is developed by Jason Rohrer in a public SourceForge repository and is like most of his creative works in the public domain. The Castle Doctrine was developed as an early access game and is now sold on Steam. | |
 | The Oregon Trail | 1975 | Role-playing video game | Public domain (?) | Public domain (?) | Don Rawitsch / MECC | First publicly released in 1975 in BASIC, as was the updated 1978 version which was more widely published in Creative Computing, May/June 1978. Source rediscovered in 2011. | |
 | The Prisoner | 1980 | adventure game | Proprietary | Proprietary | Edu-Ware / David Mullich | Developed in BASIC for the Apple II the source code was available with the release. Source code is hosted on GitHub. | |
 | Thirty Flights of Loving | 2012 | Adventure game | GPLv2+ | Proprietary | Blendo Games | Game source released in August 2012 as it is based on the KMQuake II source port. | |
| Tokyo Friend Park 2 Ketteiban: Minna de Chōsen! Taikan Attraction | 2009 | Party | Proprietary | Proprietary | Art | Game source included on the disc, in addition to a screenshot program written for Nintendo of America included with the Wii's SDK. Does not include Art's system libraries. As most DVD readers cannot read Wii discs, and the source itself cannot be accessed without a homebrewed console, it is unclear if the code's release was intentional. | ||
 | Vulture for Nethack | 1987 | rogue-like | NetHack General Public License | Freeware / Commercial | NetHack community / Jaakko Peltonen / Clive Crous | Falcon's Eye was developed by Jaakko Peltonen as graphical version of NetHack. After 2001 development had ended, Clive Crous continued Falcon's Eye as Vulture's Eye. While still being Free and open-source software the game is commercialized via the author's website and Desura. In October 2013 the game was put into the Steam Greenlight process and successfully released on Steam in January 2016. | |
 | Wargroove | 2019 | Turn-based tactics | Apache-2.0 | Proprietary | Chucklefish | Halley, the custom engine made for Wargroove, has been available on GitHub to the public at least since 2018. | |
 | Wolfenstein 3D Classic Platinum | 2009 | First-person shooter | GPLv2+ | Proprietary | id Software | Source code of the iOS port released in March 2009 as it is based on the Wolfenstein 3-D Redux source port. | |
 | Wrath: Aeon of Ruin | 2019 (early access) | First-person shooter | GPLv2+ | Proprietary | KillPixel | Being released in November 2019 as early access game, based on the DarkPlaces engine, the game's source code was also released on GitHub. | |
| Games with available source code | ||||||||
 | 360: Three Sixty | 1999 | Racing | Smart Dog | PlayStation | 2020 | ||
 | Actua Soccer 96 | 1996 | Sports | Gremlin Interactive | MS-DOS | 1996 | ||
 | Adventure in Time | 1981 | Adventure game | Phoenix Software | Atari 8-bit/Apple II | 2016 | ||
 | Age of Pirates: Captain Blood | 2010 | Action-adventure game/Hack and slash | 1C: Seawolf Studio | Windows | 2022 | ||
 | Age of Pirates 2: City of Abandoned Ships | 2009 | Role-playing game | Akella | Windows | 2021 | ||
| Airforce Delta | 2000 | Flight simulator | Climax Studios | Game Boy Color | 2020 | |||
 | Aliens versus Predator 2 | 2001 | FPS | Monolith Productions | Windows | 2002 | ||
 | Area 51 | 2005 | FPS | Midway Studios Austin | PlayStation 2, Xbox | 2024 | ||
 | Asteroids | 1979 | Arcade | Atari | Atari 7800 | 1996 | ||
 | Army Men | 1998 | Real-time tactics | The 3DO Company | Windows | 2022 | ||
 | Art of Fighting | 1992 | Fighting | SNK | Neo Geo | 2014 | ||
 | Aztec | 1982 | Action-adventure | Datamost | Atari 8-bit | 2019 | ||
| Battle Konchuuden | 1999 | Role-playing game | Jaleco Entertainment | PlayStation | 2019 | |||
 | Beatmania 5th Mix | 1999 | Music video game | Konami | PlayStation | 2000 | ||
 | The Bilestoad | 1982 | Action-adventure | Datamost | Apple II | 2019 | ||
 | The Black Cauldron | 1985 | Adventure | Sierra Entertainment | MS-DOS | 2022 | ||
 | Blood | 1997 | FPS | QStudios / Monolith Productions | MS-DOS | 2000–2010, 2023 | ||
 | Blood & Magic | 1996 | Real-time strategy | Tachyon Studios | MS-DOS | 2021 | ||
 | B.O.B. / Space Funky B.O.B. | 1993 | Side-scrolling game | Electronic Arts | SNES | 2008 | ||
 | Buck Rogers: Planet of Zoom | 1983 | Rail shooter | Sega | Atari 8-bit | 2018 | ||
| California Watersports | 2001 | Sports | Theyer GFX | PlayStation | 2020 | |||
 | Captain Comic | 1988 | Platformer | Michael Denio | NES | 2012 | ||
 | Chicken Run | 2000 | Stealth game | Blitz Games | Dreamcast, Game Boy Color | 2011, 2024 | ||
 | Chill | 1998 | Sports | Silicon Dreams | PlayStation | 2020 | ||
 | Columns | 1990 | Puzzle game | Sega | Game Gear | 2010 | ||
 | Counter-Strike: Global Offensive | 2012 | First-person shooter | Valve | Windows | 2020 | ||
 | Cruis'n USA | 1994 | Racing game | Midway Games | Arcade | 2021 | ||
 | Crysis | 2007 | First-person shooter | Crytek | Windows, Xbox 360, PlayStation 3 | 2026 | ||
 | Crysis 2 | 2011 | First-person shooter | Crytek | Windows, Xbox 360, PlayStation 3 | 2022 | ||
 | Crysis 3 | 2013 | First-person shooter | Crytek | Windows | 2024 | ||
 | Cybermorph | 1993 | Graphic adventure | Attention to Detail | Atari Jaguar | 2014 | ||
 | Cyberpunk 2077 | 2020 | Role-playing game | CD Projekt Red | Windows | 2021 | ||
 | Dark Chambers | 1988 | Dungeon crawl | Atari Corporation | Atari 2600 | 2008 | ||
| Dark Engine (Thief, Thief II, System Shock 2) | 1998 | Stealth game | Looking Glass Studios | Windows | 2009–2010 | |||
 | Dark Reign 2 | 2000 | RTS | Pandemic Studios | Windows | 2011 | ||
 | Defender | 1981 | Scrolling shooter | Williams Electronics | Arcade | 2021 | ||
 | Desert Falcon | 1987 | Scrolling shooter | General Computer Corporation | Atari 2600 | 2008 | ||
 | Devil May Cry 2 | 2003 | Hack and slash | Capcom | Various | 2020 | ||
 | Donald Duck's Playground | 1986 | Adventure | Sierra Entertainment | MS-DOS | 2022 | ||
 | Donkey Kong | 1981 | Platform | Nintendo | Atari 8-bit | 2008 | ||
 | Doom | 1993 | First-person shooter | id Software | Macintosh, DOS, SNES | 2023, 2024 | ||
 | Double Dragon II: The Revenge | 1989 | Beat em up | Technōs Japan | MS-DOS | 2013 | ||
 | Dragon Rage | 2001 | Shooter | The 3DO Company | PlayStation 2 | 2001 | ||
 | Duke Nukem Forever (alpha version only) | 2001 | First-person shooter | 3D Realms | Windows | 2022 | ||
 | Empire | 1977 | turn-based wargame | Walter Bright | FORTRAN/PDP-10 | 197? | ||
 | Eve Online | 2003 | Space strategy MMO | CCP Games | Windows | 2011 | ||
 | Extreme-G 3 | 2001 | Racing game | Acclaim Cheltenham | PlayStation 2 | 2015 | ||
 | Eye of the Beholder II: The Legend of Darkmoon | 1991 | Role-playing game | Westwood Associates | MS-DOS | 2021 | ||
 | Falcon 4.0 | 1998 | Combat flight simulator | MicroProse | Windows | 2000 | ||
 | Fall Guys: Ultimate Knockout | 2020 | Battle royale game | Mediatonic | Windows | 2021 | ||
 | Fate | 2005 | Action RPG | WildTangent | Windows | 2015 | ||
 | Far Cry | 2004 | First-person shooter | Crytek | Various | 2023 | ||
| Football Director DS | 2008 | Sports | Sports Director Limited | Nintendo DS | 2024 | |||
 | The F.A. Premier League Stars | 2000 | Sports | Electronic Arts | Windows | 2016 | ||
 | FIFA 97 | 1996 | Sports | Electronic Arts | Windows | 1996 | ||
 | FIFA 21 | 2020 | Sports | Electronic Arts | Various | 2021 | ||
 | Forsaken | 1998 | 6DOF shooter | Probe Entertainment | Windows | 2007 | ||
 | Friday the 13th: The Game | 2017 | Survival horror | IIIFonic, Black Tower Studios | Various | 2021 | ||
 | Frogger (1997) | 1997 | Action | SCE Studio Cambridge | PlayStation, Windows | 2023 | ||
 | Frogger (Game.com) | 1999 | Action | Hasbro Interactive | Game.com | 2011 | ||
 | Frogger 2: Swampy's Revenge | 2000 | Action | Blitz Games | PlayStation, Windows, Dreamcast, Game Boy Color, Nintendo 64 | 2025 | ||
 | Gears of War | 2006 | Third-person shooter | Epic Games | Xbox 360 Windows | Unknown | ||
 | Glover | 1999 | Platformer | Blitz Games | PlayStation | 2024 | ||
 | Grand Theft Auto V | 2013 | Action-adventure | Rockstar North | Windows | 2023 | ||
 | Guilty Gear Strive | 2021 | Fighting | Arc System Works | Xbox One, PlayStation 4, Windows | 2025 | ||
 | GunZ: The Duel | 2005 | Third-person shooter | MAIET Entertainment | Windows | 2011 | ||
 | Gwent: The Witcher Card Game | 2018 | Collectible card game | CD Projekt Red | Windows | 2021 | ||
Table data adapted from its source, CC BY-SA 4.0.