| Conor O'Donovan | Developer | |
| Conor O'Kane | Developer | |
| Conrad Fay | Developer | |
| Conradical's Games | Developer | |
| Considerable Content | Developer | |
| Consistency3D | Developer | |
| Console Labs | Developer | |
| Conspiracy Entertainment | DeveloperPublisher | |
| Conspiracy Entertainment EU | Publisher | |
| Conspiracy Entertainment NA | Publisher | |
| Conspiracy EntertainmentNA | Publisher | |
| Conspiracy Games | Publisher | |
| Constantin Liétard | Developer | |
| Constantine_C | Developer | |
| Constipated Gorilla Studios | Developer | |
| Consult | Developer | |
| Consult Computer Systems (Derrick P. Rowson, Dave Howcroft, Dave Kelly, Paul D. Walker) | Developer | |
| Consult Computer Systems (Derrick P. Rowson, Richard Naylor, Dave Kelly) | Developer | |
| Consult Software (Christian F Urquhart, Paul Johnson, Dave Kelly) | Developer | |
| Consult Software (Glenn Benson | Developer | |
| Consult Software (Paul Johnson, Christian Urquhart, A.J. Madden) | Developer | |
| Contaminate | Developer | |
| Contigo Games | Developer | |
| Continental Software | Publisher | |
| Contingent99 | Developer | |
| Continuum Entertainment | DeveloperPublisher | |
| Contortionist Games | Developer | |
| Contos e Games | Developer | |
| Contraband Entertainment | Developer | |
| Contrail | Developer | |
| Contrary Scholars | Developer | |
| Contrebasse | Developer | |
| ControlC | Developer | |
| Controlled Descent | Developer | |
| ControlledChaosGamingCo | Developer | |
| Conundrum | Developer | |
| Convict Games | DeveloperPublisher | |
| Convolutional | Developer | |
| Convoy Games | Developer | |
| CooCooSqueaky | Developer | |
| CooLeviX | Developer | |
| Cooked Pancakes | Developer | |
| CookieNoir | Developer | |
| CookieSalad | Developer | |
| Cookies Need Love | Developer | |
| Cookies n' Cats | Developer | |
| Cooking Companions! | Developer | |
| Cooking Mama Limited | Developer | |
| CookingWithCat | Developer | |
| Cool As Ice Tea | Developer | |