The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- Ronimo Games (Publisher) (1 member)
- Route 1 Games (Developer) (1 member)
- 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) (31 members)
- SPU block size: Safe (Config) (3 members)
- SPU decoder: Interpreter (dynamic) (Config) (1 member)
- SPU decoder: Interpreter (static) (Config) (2 members)
- SPU decoder: Recompiler (ASMJIT) (Config) (6 members)
- SPU decoder: Recompiler (LLVM) (Config) (0 members)
- SPU xfloat accuracy: Accurate (Config) (6 members)
- SPU xfloat accuracy: Approximate (Config) (4 members)
- SPU xfloat accuracy: Relaxed (Config) (9 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)
- San Diego Studio (Developer) (18 members)
- Sand Grain Studios (Developer) (3 members)
- Sandblast Games (Developer) (1 member)
- Sandbox (Genre) (7 members)
- Sandlot (Developer) (1 member)
- Sangoku Hime (Series) (1 member)
- Sangokushi (Series) (2 members)
- Sanuk Games (Publisher) (1 member)
- Sanzaru Games (Developer) (3 members)
- Sarbakan (Developer) (1 member)
- Saurus (Developer) (1 member)
- Saw (Series) (2 members)
- Scene It? (Series) (2 members)