| Computer Applications Unlimited | DeveloperPublisher | |
| Computer Artworks | Developer | |
| Computer Artworks Ltd. | Developer | |
| Computer Easy | Publisher | |
| Computer Engineering Services | Developer | |
| Computer Magic, Ltd. | Developer | |
| Computer Recreations | Publisher | |
| Computer Specialties | Publisher | |
| Computer Vs World | Developer | |
| Computer and Video Games | Publisher | |
| Computer's Dream | Developer | |
| ComputerCow | Developer | |
| ComputerEasy | Publisher | |
| ComputerJames | Developer | |
| Computerology | Developer | |
| Computersmiths | Publisher | |
| Computing Specialties | Publisher | |
| Comrade_Crawdad | Developer | |
| Comsoft | Publisher | |
| Comtec | Developer | |
| Conan Software | DeveloperPublisher | |
| Concept Animations (Neil Dodwell, Dave Dew) | Developer | |
| Concept Software (John Heap, Paul Clancey) | Developer | |
| Conceptgame | Developer | |
| Conception Software | Developer | |
| ConcernedApe | DeveloperPublisher | |
| Concrete Games | Developer | |
| Concrete Games Research Lab | Developer | |
| Condor | Developer | |
| Condor Software | Developer | |
| Condor, Inc. | Developer | |
| Coneja Mutante | Developer | |
| Confounding Factor | Developer | |
| Confused Pelican | DeveloperPublisher | |
| Congenial Telegram | Developer | |
| Conjured | Developer | |
| Conk | Developer | |
| Connect Line | DeveloperPublisher | |
| Connecta | Developer | |
| Connected Content Group | Developer | |
| ConnnK | Developer | |
| Connor Aguilar | Developer | |
| Connor Sherlock | Developer | |
| Connor Thomas Cleary | Developer | |
| Connor Wolf | Developer | |
| ConnorORT | Developer | |
| Connorfett | Developer | |
| Conor Hehr | Developer | |
| Conor Mccann | Developer | |
| Conor Mulligan | Developer | |
| 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 | |