Category
page 1Commercial video games with freely available source code

Doom
1993 first-person shooter video game developed by id Software
Q217423
1996 first-person shooter
Q203310
2004 science fiction first-person shooter horror video game

Wolfenstein 3D
1992 first-person shooter video game

Doom II
1994 first-person shooter video game developed by id Software
Q4047361
1989 video game

Duke Nukem 3D
1996 first-person shooter video game

Command & Conquer: Red Alert
1996 video game

Quake II
1997 first-person shooter video game by id Software

Quake III Arena
1999 video game

SimCity
1989 video game
Q868523
1995 video game developed by Westwood Studios
Return to Castle Wolfenstein
2001 video game

Q820217
2003 video game
Q864177
1991 puzzle-platformer video game

Colossal Cave Adventure
1976 video game

System Shock
1994 video game

Star Wars Jedi Knight: Jedi Academy
2003 video game

Wolfenstein: Enemy Territory
2003 video game

VVVVVV
VVVVVV is a 2010 puzzle-platform game created by Terry Cavanagh. In the game, the player controls Captain Viridian, who must rescue their spacecrew after a teleporter malfunction caused them to be separated in Dimension VVVVVV. The gameplay is characterized by the inability of the player to jump, instead opting on controlling the direction of gravity, causing the player to fall upwards or downwards. The game consists of more than 400 individual rooms, and also supports the creation of user-created levels.

To the Moon
2011 video game

Re-Volt

Star Wars Jedi Knight II: Jedi Outcast
2002 video game

Command & Conquer: Renegade
2002 video game

Hexen: Beyond Heretic
1995 video game

Warzone 2100
1999 Windows strategy video game by Pumpkin Studios published by Eidos, revived by Warzone 2100 Project

The Operative: No One Lives Forever
2000 video game

Little Big Adventure
1994 action-adventure game developed by Adeline Software International

Postal
1997 video game

Arx Fatalis
2002 video game

Heretic
1994 video game
Q1069497
2003 expansion video game to Command & Conquer: Generals

Beneath a Steel Sky
1994 video game developed by Virgin Interactive Entertainment

The Oregon Trail
1971 video game
Q884508
2003 video game

Descent
1995 first-person shooter game

flOw
2006 indie video game

Aquaria
2007 video game
Q1930787
1997 first-person shooter video game developed by 3D Realms

Akalabeth: World of Doom
1979 video game
Q55815
1984 video game

Penumbra: Overture
2007 video game

Call to Power II
2000 video game

Dungeon Defenders
2011 video game

Tempest
Atari vector arcade game from 1981

Dink Smallwood
1998 video game

Jagged Alliance 2
1999 video game

Hexen II
1997 video game

Tyrian
1995 video game
Q2380244
1997 computer game developed by Adeline Software International

Trespasser
1998 video game

Double Dragon II: The Revenge
1988 arcade game

Blood II: The Chosen
1998 video game

Falcon 4.0
1998 video game

No One Lives Forever 2: A Spy in H.A.R.M.'s Way
2002 American first person shooter video game

Airline Tycoon
1998 video game

Aliens Versus Predator
1999 video game

Rise of the Triad
1994 video game

A Bird Story
2014 video game

Space Ace
1984 video game