The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Rovio Entertainment (Developer) (2 members)
- Rugby Challenge (Series) (3 members)
- Rugby League (Series) (2 members)
- Ryu Ga Gotoku Studio (Developer) (8 members)
- SCE Japan Studio (Developer) (1 member)
- SCE San Diego Studio (Developer) (1 member)
- SCE Santa Monica Studio (Developer) (7 members)
- SCE Studio Liverpool (Developer) (2 members)
- SNK (Developer) (2 members)
- SNK Playmore (Developer) (13 members)
- SNK Playmore (Publisher) (18 members)
- SOCOM (Series) (2 members)
- SPU block size: Mega (Config) (26 members)
- SPU block size: Safe (Config) (3 members)
- SPU decoder: Interpreter (static) (Config) (2 members)
- SPU decoder: Recompiler (ASMJIT) (Config) (7 members)
- SPU decoder: Recompiler (LLVM) (Config) (0 members)
- SPU xfloat accuracy: Accurate (Config) (5 members)
- SPU xfloat accuracy: Approximate (Config) (4 members)
- SPU xfloat accuracy: Relaxed (Config) (8 members)