505 Games
Activision
Advanced Micro Devices
Atari
Atlus U.S.A., Inc.
Bethesda Softworks LLC
Capcom Entertainment, Inc.
Crave Games
Disney Interactive Studios, Inc.
Electronic Arts, Inc.
Epic Games, Inc.
Konami Digital Entertainment, Inc.
LucasArts Entertainment Company LLC
Majesco Entertainment Company
Microsoft Corporation
NAMCO BANDAI Games America Inc.
Natsume, Inc.
Nintendo of America, Inc.
NVIDIA Corporation
OnLive, Inc.
Perfect World Entertainment
Proximo Games
Sega of America, Inc.
Sony Computer Entertainment America Inc.
Sony Online Entertainment LLC
Square Enix, Inc.
Take-Two Interactive, Inc.
THQ Inc.
Trion Worlds, Inc.
Ubisoft Entertainment
Warner Bros. Interactive Entertainment Inc.

Link