O site oficial da Tokyo Game Show 2012 foi inaugurado. Clique aqui para conferi-lo. Abaixo segue uma lista parcial das desenvolvedoras e companhias confirmadas no evento:

• ARC SYSTEM WORKS Co., Ltd.
• ASCII MEDIA WORKS INC.
• AVATRIP (Russia)
• Bushiroad Inc.
• Capcom Co.,Ltd.
• China Pavilion (China)

  Guangzhou Aipai Network Technology Co.,Ltd (China)
  Hangzhou Xuanji Science&Technology Information Corporation (China)
  Nanjing Bbmf Information Technology Co., Ltd. (China)
  Nanjing Magic Cube Technology Co., Ltd. (China)
  Nanjing Nine Elements Film TV & Gartoon Co., Ltd. (China)
  NedDragon Websoft Inc. (China)
  Original Force 3D Animation Studio (China)
  Shanghai Giant Network Science & Technology Co., Ltd. (China)
  Shanghai Internationalo Cultural Service and Trade Platform (China)
  Shanxi Bough Animation Company (China)
  Shanxi Huizhong Animation Technology Development Co., Ltd. (China)
  Shengqu Information Technology (Shanghai) Co., Ltd. (China)
  Zhejiang Sinour Industry Co., Ltd. (China)
  Zhejiang Zhongnan Animation Co., Ltd. (China)

• D3 PUBLISHER INC.
• ENTERBRAIN, INC.
• GameSalad
• gloops, Inc.
• G-mode Co., Ltd.
• GREE, Inc.
• HAPPINET CORPORATION
• KONAMI
• KOZIN-MON/KGS/SOGOGAKUEN HUMANACADEMY
• LEVEL-5 Inc.
• MEDAROT INC
• MORI GAMES CO., LTD.
• MUNAZO INC.
• NADESHIKO STYLER
• NAMCO BANDAI Games Inc.
• PROTOTYPE CO., LTD.
• Scanavo Manufacturing Hong Kong Ltd. (Hong Kong)
• SECT INTERNATIONAL CORPORATION
• SEGA CORPORATION
• SIGGRAPH Asia 2012 (Singapore)
• Sony Computer Entertainment Inc.
• SQUARE ENIX CO., LTD.
• SteelSeries (Denmark)
• Taiwan Game Pavilion (Taiwan)

  Art and Mobile Entertainment Co., Ltd. (Taiwan)
  Dept. of Multimedia and Game Science, Lunghwa University of Science and Technology (Taiwan)
  International Games System Co., Ltd. (Taiwan)
  MOBAGEL INC. (Taiwan)
  X-LEGEND Entertainment Co., Ltd. (Taiwan)
  XPEC Entertainment Inc. (Taiwan)
  Taiwan External Trade Development Council (Taiwan)

• TECMO KOEI GAMES CO., LTD.
• VUZIX Corporation (USA)
• Wizards of the Coast LLC (USA)
• Zhejiang Pavilion (China)

  FanFan Comic Technology Co., Ltd. (China)
  Hangzhou StarQ Information Technology Co., Ltd. (China)
  Zhejiang Dishun Tech. Co., Ltd. (China)
  Zhejiang Zhongnan Group Cartoon and Animation Television Co., Ltd. (China)

Confira a lista completa clicando aqui.