Abuse
Arx Fatalis
Aleph One
Aquaria
AssaultCube
C-evo
Chromium B.S.U.
CodeRED: Alien Arena
CorsixTH
Cube 2: Sauerbraten
Doom
Doom 3
Duke Nukem 3D
Dune Legacy
FreeSpace 2 Source Code Project
Proprietary
Proprietary
Frogatto & Friends
Gish
Heretic
Hexen
Hexen II
Lugaru
M.A.X.Gold
Myst Online: Uru Live
OpenDune
OpenRA
OpenTyrian
Penumbra: Overture
Planeshift
Prince of Persia
Project: Starfighter
Pushover
Quake
Quake II
Quake III Arena
Red Eclipse
Revenge of the Titans
Racer
Proprietary
Proprietary
Rise of the Triad
Shadow Warrior
Simutrans Transport Simulator
Smokin' Guns
Spring
StepMania
Return to Castle Wolfenstein
Steel Storm: Episode I
Thousand Parsec
TORCS
Urban Terror
Vdrift
Warsow
Wolfenstein: Enemy Territory
World of Padman
Xbattle
XEvil