The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Sega (Publisher) (108 members)
- Sega AM2 (Developer) (1 member)
- Sega AM3 (Developer) (2 members)
- Sega Racing Studio (Developer) (1 member)
- Sega Rally (Series) (1 member)
- Sega Studios Australia (Developer) (1 member)
- Sega Technical Institute (Developer) (1 member)
- Semanoor International (Publisher) (1 member)
- Semaphore (Developer) (1 member)
- Sengoku Basara (Series) (4 members)
- Sengoku Hime (Series) (4 members)
- Series (265 members)
- Serious Parody (Developer) (1 member)
- Serious Parody (Publisher) (1 member)
- Seven45 Studios (Developer) (1 member)
- Seven45 Studios (Publisher) (1 member)
- SevenOne Intermedia (Developer) (1 member)
- SevenOne Intermedia (Publisher) (1 member)
- Shaba Games (Developer) (1 member)
- Shader mode: Async with Shader Interpreter (Config) (2 members)