The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Cyanide Studio (Developer) (7 members)
- CyberConnect2 (Developer) (10 members)
- CyberFront (Developer) (1 member)
- CyberFront (Publisher) (8 members)
- D3 Publisher (Publisher) (27 members)
- DICE (Developer) (7 members)
- DONTNOD Entertainment (Developer) (1 member)
- DTP Entertainment (Developer) (1 member)
- DTP Entertainment (Publisher) (8 members)
- Daisenryaku (Series) (5 members)
- Dancing Dots Studio (Developer) (1 member)
- Danger Close Games (Developer) (1 member)
- Dark Energy Digital (Developer) (4 members)
- Dark Energy Digital (Publisher) (2 members)
- Darksiders (Series) (2 members)
- Date A Live (Series) (2 members)
- Day 1 Studios (Developer) (2 members)
- Dead Island (Series) (3 members)
- Dead Space (Series) (5 members)
- Deadliest Warrior (Series) (2 members)