The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Puzzle (Genre) (132 members)
- Puzzle Quest (Series) (3 members)
- Pwnee Studios (Developer) (1 member)
- Pyro Studios (Developer) (1 member)
- Q-Games (Developer) (8 members)
- Q-Games (Publisher) (5 members)
- QV Software (Publisher) (1 member)
- Q Entertainment (Developer) (3 members)
- Q Entertainment (Publisher) (3 members)
- QuByte Interactive (Developer) (1 member)
- QuByte Interactive (Publisher) (1 member)
- Quantic Dream (Developer) (2 members)
- Queasy Games (Developer) (2 members)
- Quirkat (Developer) (1 member)
- Quirkat (Publisher) (1 member)
- RSX FIFO accuracy: Atomic (Config) (74 members)
- RSX FIFO accuracy: Ordered & Atomic (Config) (4 members)
- RTL Interactive (Publisher) (1 member)
- Racing (Genre) (149 members)
- Radical Entertainment (Developer) (2 members)
- Rail shooter (Genre) (21 members)
- Rain Games (Developer) (1 member)
- Rain Games (Publisher) (1 member)
- Rainbow (Series) (2 members)
- Rainbow Studios (Developer) (4 members)
- Ratchet & Clank (Series) (8 members)
- Ratchet & Clank Future (Series) (4 members)
- Ratloop (Developer) (1 member)
- Ratloop (Publisher) (1 member)
- Raven Software (Developer) (4 members)
- Ravn Studio (Developer) (1 member)
- Rayman (Series) (1 member)
- Re-Logic (Developer) (1 member)
- Read color buffers: Off (Config) (1 member)
- Read color buffers: On (Config) (37 members)
- Read depth buffers: On (Config) (6 members)
- Ready at Dawn (Developer) (1 member)
- Real-time strategy (Genre) (2 members)
- Real-time tactics (Genre) (2 members)
- Reality Pump (Developer) (2 members)
- Realta Entertainment Group (Developer) (1 member)
- Rebellion Developments (Developer) (7 members)
- Recoil Games (Developer) (1 member)
- Recom (Developer) (1 member)
- Recom (Publisher) (2 members)
- Record of Agarest (Series) (3 members)
- Red Dead (Series) (2 members)
- Red Entertainment (Developer) (2 members)
- Red Faction (Series) (3 members)
- Red Fly Studio (Developer) (1 member)