The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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) (138 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) (3 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)