The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Queasy Games (Developer) (2 members)
- Quirkat (Developer) (1 member)
- Quirkat (Publisher) (1 member)
- RSX FIFO accuracy: Atomic (Config) (66 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)