1. Companies starting with C:

      Cabochon
      California Pacific Computer
      Callisto Corporation
      Camel 101
      CanalRun
      Capcom
      Casady & Greene
      Cascade Computerware
      Cascade Games Ltd
      Casual Games Arcade
      Cat Daddy Games
      Cateia Games
      Cauldron
      Cavalier Computer
      CDV Software
      Cedar Software
      Centauri Production
      Centauri Productions
      Certain Affinity
      Chafitz
      Changeling Software
      Cheeky Monkey Software
      Chris Sawyer
      Chromatic Software
      Chronic Logic
      Cinemaware
      City Interactive
      Clever's Games
      Climax
      Clockwork Games
      Cloud 9 Interactive
      Codemasters
      Codeminion
      Codeproject
      Coffee Stain Studios
      Color Software
      Colorquest
      Commodore Business Machines
      Comp-U-Gamer Software
      Compuserve
      Computer Heroes
      Computer Knowledge
      Computer Magic
      Computer Price Index
      Computer Programs Unlimited
      Computer Shack
      Computerland
      Computerware
      Compu-things
      Conflict Recreations
      Conroy & Conroy Company
      Console Classix
      Conspiracy
      Coolsoft
      COR Entertainment
      Core Design
      Cortland Data Systems
      COSMI
      Covert BitOps
      Crave Entertainment
      Creat Studio
      Creative Assembly
      Creative Asylum
      Creative Multimedia
      Creative Software
      Creative Technical Consultants
      Creative Wonders
      Crocodile
      Cromemco
      Crossdown
      CroTeam
      Cryptic Studios
      Crystal Dynamics
      Crystal New Media
      CrystalVision
      Crystalware
      Crytek
      Cyan
      CyberConnect 2
      Cyberfront
      Cyberlore Studios
      Cygnus Studios
      Cyna Games
      Cypris Software

      Note: bolded names indicate companies that released a game within the last twelve months.