| 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 | |