| Circuit Warz | Developer | |
| Circus | DeveloperPublisher | |
| Circus Atos | Developer | |
| Circus Freak | Developer | |
| Circus Horse | Developer | |
| Ciro Durán | Developer | |
| Ciro Studios | Developer | |
| Cirque Verte | Developer | |
| Cirrata | Developer | |
| CiscoGD | Developer | |
| Cisteto Senestro | Developer | |
| CitDevChris | Developer | |
| Citeremis | DeveloperPublisher | |
| Cithryth | Developer | |
| Citizen Of Mêlée | Developer | |
| Citizen Software | Developer | |
| Citizen Software (Steve Evans) | Developer | |
| Citizen Stories | Developer | |
| CitizenDevelopers | Developer | |
| Citizens of Antiford | Developer | |
| Citrus | Developer | |
| CitrusPulp | Developer | |
| City Connection | DeveloperPublisher | |
| City From Naught | Developer | |
| City Interactive | DeveloperPublisher | |
| CityMayor Games | Developer | |
| Citybelle | Developer | |
| Citybuilder Studios | Developer | |
| Cj_Gill | Developer | |
| Cladcake | Developer | |
| Claire Morwood | Developer | |
| ClaireW | Developer | |
| Clancy Interactive Entertainment | Developer | |
| Clandestine Games | Developer | |
| Clans to Kingdoms | DeveloperPublisher | |
| Clap Hanz | Developer | |
| Clapfoot Games | DeveloperPublisher | |
| Clara | Developer | |
| Clara F-V | Developer | |
| Clarc | Developer | |
| Clarissimo | Developer | |
| ClaritaUslu | Developer | |
| Clark Alinsob | Developer | |
| Clark Otto Jr. | Developer | |
| Clark Otto, Jr. | Developer | |
| Clarvalon | Developer | |
| ClashCat | Developer | |
| ClashDev | Developer | |
| Classi5ed | Developer | |
| Classic Anto | Developer | |