The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- SYNC (Developer) (1 member)
- Saber Interactive (Developer) (3 members)
- Sacred (Series) (3 members)
- Saint Seiya (Series) (3 members)
- Saints Row (Series) (4 members)
- Sam & Max (Series) (2 members)
- Sammy Corporation (Developer) (1 member)
- Samurai Warriors (Series) (7 members)