Left 4 Dead 2 (2009), Valve Corporation
Left 4 Dead (2008), Valve Corporation
Half-Life 2: Episode Two (2007), Buka Entertainment
The Orange Box (2007), Valve Corporation
Portal (2007), Buka Entertainment
Half-Life 2: Episode One (2006), Valve Corporation
Counter-Strike: Source (2004), Valve Corporation
Half-Life 2 (2004), Valve Corporation
Return to Castle Wolfenstein: Operation Resurrection (2003), Activision Publishing, Inc.
Quake III: Arena (2000), SEGA Corporation
Quake II (1999), Activision, Inc.
Quake (1998), Midway Games, Inc.
DOOM 64 (1997), Midway Games, Inc.
DOOM (1996), Art Data Interactive, Inc.
Final DOOM (1996), Atari, Inc.
DOOM (1995), Williams Entertainment Inc.