| Colin Dooley | Developer | |
| Colin EUMP | Developer | |
| Colin Grunes | Developer | |
| Colin Jones | Developer | |
| Colin Jordan | Developer | |
| Colin Lane | Developer | |
| Colin Lane Games | Developer | |
| Colin Liddle | Developer | |
| Colin Mitchell | Developer | |
| Colin Saunders | Developer | |
| Colin Swinbourne | Developer | |
| Colin Watterson | Developer | |
| ColinCW | Developer | |
| ColinChar | Developer | |
| Colisan | Developer | |
| Collage Games | Developer | |
| Collavier | Developer | |
| Collavier Corporation | DeveloperPublisher | |
| CollectorVision | Publisher | |
| Colleen Craige | Developer | |
| CollegeHumor | Publisher | |
| Collin Lyons | Developer | |
| Collision 2D | Developer | |
| Collision Studios | Developer | |
| Colonel Sandwich | Developer | |
| ColonelLazuli | Developer | |
| Colonthree Enterprises | Developer | |
| Colopl | DeveloperPublisher | |
| Color Dreams | Developer | |
| Color Spray Games | Developer | |
| ColorPepper | Developer | |
| ColorPhoenix | Developer | |
| Colorado Computer Creations | Developer | |
| Colorado Software Associates | Publisher | |
| Colorics | Developer | |
| Colorspace Studio | DeveloperPublisher | |
| Colossai Studios | Developer | |
| Colossal Order | Developer | |
| Colossal Pictures | DeveloperPublisher | |
| ColossalWreck | Developer | |
| Colossil | Developer | |
| Colpax | Publisher | |
| Columbia Data Products | DeveloperPublisher | |
| Columbia Music Entertainment | DeveloperPublisher | |
| ComTec (Keith Jackson, Mark Fisher, Paul Laidlaw, Damon Redmond, John Cassells) | Developer | |
| Comad | DeveloperPublisher | |
| Combo Bits Studios | Developer | |
| Combo Studios | Developer | |
| ComboSmooth | Developer | |
| Combokarel | Developer | |
| Comcept | Developer | |
| Comedy Central | Publisher | |
| Comedy Reflux | Developer | |
| CometFall | Developer | |
| Comfort | DeveloperPublisher | |
| ComfortSoft | Publisher | |
| Comfy Council Studios | Developer | |
| ComfyCompany | Developer | |
| ComfyGames | Developer | |
| Comi | Developer | |
| Comix | Developer | |
| Comix (Jose Vicente Pons) | Developer | |
| Comix (Jose Vicente Pons, Jose Queral) | Developer | |
| Comix Productions | Publisher | |
| CommanderCookie | Developer | |
| CommanderHux | Developer | |
| Commodore International | Publisher | |
| Commodore Shawn | Developer | |
| Commodore Spain | Developer | |
| Common Colors | Developer | |
| Commonseed | DeveloperPublisher | |
| Commotion Interactive | Developer | |
| Commseed | DeveloperPublisher | |
| Communication Group Plum | DeveloperPublisher | |
| Comodoro | Developer | |
| Comolink Inc. | Developer | |
| Comp-3 Interactive | Developer | |
| Compac | DeveloperPublisher | |
| Compac Inc. | DeveloperPublisher | |
| Company of Kasalo | Developer | |
| CompanyNotFound | Developer | |
| Compedia Software & Hardware | DeveloperPublisher | |
| Compile | DeveloperPublisher | |
| Compile Heart | DeveloperPublisher | |
| Compiled Games | Developer | |
| Compjoetania | DeveloperPublisher | |
| Composerkiwi | Developer | |
| Compro Games | Developer | |
| Compro Games Ltd. | Developer | |
| Comptiq | DeveloperPublisher | |
| Compton's New Media | DeveloperPublisher | |
| Comptuq | Publisher | |
| Compu-Teach | DeveloperPublisher | |
| CompuGames Software | DeveloperPublisher | |
| Compuclassics Corporation | Publisher | |
| Compulsion Games | DeveloperPublisher | |
| Compulsivo | Developer | |
| Computasolve | Publisher | |
| Computel | Developer | |
| Computer & Entertainment Inc. | Developer | |