Companies
- Curve Digital
- Curve Games
- Curve Studios
- Cyan Worlds
- Cyanide Studio
- CyberConnect2
- Cyberfront
- Cyberlore Studios
- Cygames
- D-Pad Studio
- D3 Publisher
- d3t
- Daedalic Entertainment
- dakko dakko
- Dambuster Studios
- DANGEN Entertainment
- Danger Close Games
- Daniel Blezek
- Daniel Mullins Games
- Dark Energy Digital
- Dark Horse Comics
- Dark Math Games
- Dark Passenger
- DarkStone Digital
- Data Design Interactive
- Data Discs
- Day 1 Studios
- Daybreak Game Company
- Days of Wonder
- DC
- DC Entertainment
- DC Films
- DC Studios
- Deadline Games
- Dear Villagers
- Deck Nine Games
- Deck13 Interactive
- Deco Digital
- Deconstructeam
- Deep Silver
- Deep Silver Volition
- Deepnight Games
- Def Jam Enterprises
- Defiant Development
- Defrost Games
- Dejobaan Games
- Del Rey
- Dell Inc
- Delphine Software
- Demiurge Studios