| 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 | |
| Cool Bug Games | Developer | |
| Cool Donut | Developer | |
| Cool Old Guy Games | Developer | |
| Cool Small Games | DeveloperPublisher | |
| Cool&Cat | Developer | |
| CoolCast | Developer | |
| CoolKid3 | Developer | |
| CoolSummit | Developer | |
| Coolcandies | Developer | |
| Coolhand Interactive | Developer | |
| Cooltendo | Developer | |
| Coopalooper | Developer | |
| Cooper Saye | Developer | |
| Cooper Yang 杨天池 | Developer | |
| Cooply | Developer | |
| Cooply Solutions | Publisher | |
| Cootadude | Developer | |
| Copper Feet | Publisher | |
| Copper Spines | Developer | |
| CopperCoin Games | Developer | |
| CopperCoral | Developer | |
| Copya System | Developer | |
| Copya System JP | Publisher | |
| Copya Systems | DeveloperPublisher | |
| Copya Systems JP | Publisher | |
| Copychaser Games | Developer | |
| Copysoft | DeveloperPublisher | |
| Coralie Feniello | Developer | |
| Corbak Games | Developer | |
| CorbinGod | Developer | |
| Corbomite Games | Developer | |
| Cordelia Games | Developer | |
| Core Design | DeveloperPublisher | |
| Core Design (EU) | Publisher | |
| Core Design Ltd. | Developer | |
| Core Design Victor Interactive SoftwareJP | Publisher | |
| Core DesignPAL | Publisher | |
| Core Magazine | DeveloperPublisher | |
| Core-team | Developer | |
| CoreCode | Developer | |
| Corecell Technology | DeveloperPublisher | |
| Corecell TechnologyPAL | Publisher | |
| Corel | Publisher | |
| Corel Corporation | Publisher | |
| CorelSoft | Developer | |
| Coreland | Publisher | |
| Coren Baili | Developer | |
| Corentin Benoit-Gonin | Developer | |
| Corentin Job | Developer | |
| CorentinLEROY | Developer | |
| Coreplay | Developer | |
| Coresaken | Developer | |
| Coresoft | DeveloperPublisher | |
| CoresoftNA | Developer | |
| Corey Martin | Developer | |
| Corey Van Hoosen | Developer | |
| Coreylr197 | Developer | |
| CorgiBits | Developer | |
| Coria | Developer | |
| CorianderGames | Developer | |
| CorinnaChen | Developer | |
| Cork2312 | Developer | |
| Corkers | Publisher | |
| Cormorant42 | Developer | |
| CornBoy | Developer | |
| Cornejoo | Developer | |
| CornerPoint | Developer | |
| Cornered Rat Software | Developer | |
| Cornflake | Developer | |
| CornflakeSavage | Developer | |
| Cornfox & Bros. | Developer | |
| Cornfox & Brothers | Developer | |
| Cornutopia Software | Developer | |
| Coronadev | Developer | |
| Corporate Entity, LLC | Developer | |
| Corpsegrinder | Developer | |
| CorpsyCorpTeam | Developer | |
| Corrade | Developer | |
| Corran Nolan | Developer | |
| CorruptedMedia | Developer | |
| Corso | Developer | |
| Corspace Team | Developer | |
| Cortanium | Developer | |
| Corvaena | Developer | |
| CorvatoCafeto | Developer | |
| Corvidae | Developer | |
| Corvidae_Games | Developer | |
| Corvo Bianco Entertainment | Developer | |
| Corvostudio di Amadei Marco | DeveloperPublisher | |
| Corvus Prudens | Developer | |
| Cory | Developer | |
| CoryAlexMartin | Developer | |
| CoryMcD | Developer | |
| Cosen | DeveloperPublisher | |
| Coshlobato | Developer | |
| Cosi1125 | Developer | |
| Cosmi Corporation | DeveloperPublisher | |
| Cosmic Adventure Squad | Developer | |
| Cosmic Brew | Developer | |
| Cosmic Company | Developer | |