| 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 | |