The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Single-player (Game mode) (1,471 members)
- Size Five Games (Developer) (1 member)
- Skate (Series) (3 members)
- SkyFallen Entertainment (Developer) (1 member)
- Skylanders (Series) (6 members)
- Slang (Publisher) (1 member)
- Slant Six Games (Developer) (3 members)
- Sledgehammer Games (Developer) (2 members)
- Sleep timers accuracy: As Host (Config) (19 members)
- Sleep timers accuracy: Usleep Only (Config) (1 member)
- Slightly Mad Studios (Developer) (3 members)
- Slitherine (Developer) (1 member)
- Slitherine (Publisher) (1 member)
- Sly Cooper (Series) (3 members)
- SmackDown vs. Raw (Series) (8 members)
- Smartphone Labs LLC (Publisher) (1 member)
- Sniper: Ghost Warrior (Series) (2 members)
- Sniper Elite (Series) (2 members)
- Snowblind Studios (Developer) (1 member)
- Snowboarding (Genre) (2 members)