Arkane Studios
Bethesda Softworks, LLC/ZeniMax Media Inc.
Black Isle Studios
BioWare Corp.
Crytek GmbH
Cyanide Studio
DoubleBear Productions
Eidos Interactive Ltd.
Eidos Montreal
Frogwares Games
Frozenbyte
Gearbox Software
Ion Storm Inc.
Irrational Games
Looking Glass Studios
Obsidian Entertainment
Piranha Bytes
Rebellion Developments
Spiders Studio
Tripwire Interactive
Troika Games
Valve Corporation