The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Red Hare Studios (Developer) (1 member)
- Red Hare Studios (Publisher) (1 member)
- Red Johnson's Chronicles (Series) (2 members)
- Red Storm Entertainment (Developer) (1 member)
- Redoubt (Developer) (1 member)
- Reef Entertainment (Publisher) (2 members)
- Reflexive Entertainment (Developer) (1 member)
- Reflexive Entertainment (Publisher) (1 member)
- Regionless release date parameter (Infobox) (137 members)
- Regista (Developer) (2 members)
- Release format (3 members)
- Release region (4 members)
- Release type (4 members)
- Relentless Software (Developer) (6 members)
- Relentless Software (Publisher) (1 member)
- Relic Entertainment (Developer) (1 member)
- Renderer: OpenGL (Config) (2 members)
- Renderer: Vulkan (Config) (0 members)
- Renegade Kid (Developer) (1 member)
- Renegade Kid (Publisher) (1 member)
- Resident Evil (Series) (11 members)
- Resistance (Series) (3 members)
- Resolution scale (Config) (20 members)
- Resolution scale threshold (Config) (40 members)
- Reverb Publishing (Publisher) (2 members)
- Reverb Triple XP (Publisher) (1 member)
- Reverge Labs (Developer) (1 member)
- Rhino Studios (Developer) (1 member)
- Rhythm (Genre) (104 members)
- Ridge Racer (Series) (2 members)
- Right Square Bracket Left Square Bracket (Developer) (1 member)
- Right Square Bracket Left Square Bracket (Publisher) (1 member)
- Ripstone (Developer) (1 member)
- Ripstone (Publisher) (4 members)
- Risen (Series) (2 members)
- Rising Star Games (Publisher) (5 members)
- Risk (Series) (2 members)
- Robomodo (Developer) (4 members)
- Rock Band (Series) (12 members)
- Rockin' Android (Publisher) (1 member)
- Rocksmith (Series) (2 members)
- Rockstar Games (Developer) (8 members)
- Rockstar Games (Publisher) (9 members)
- Rocksteady Studios (Developer) (2 members)
- Roguelike (Genre) (1 member)
- Role-playing (Genre) (93 members)
- Roll7 (Developer) (1 member)
- Roll7 (Publisher) (1 member)
- Rombax Games (Publisher) (3 members)
- Ronimo Games (Developer) (2 members)