The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- United Front Games (Developer) (3 members)
- United Game Artists (Developer) (1 member)
- Unknown/invalid (Release region) (0 members)
- Upper One Games (Developer) (1 member)
- Us! (Developer) (1 member)
- UserJoy Technology (Developer) (1 member)
- Userjoy Technology (Developer) (1 member)
- Userjoy Technology (Publisher) (1 member)
- Utawarerumono (Series) (2 members)
- VBlank NTSC Fixup: On (Config) (1 member)
- VSync: On (Config) (1 member)
- Valcon Games (Publisher) (4 members)
- Valve (Developer) (2 members)
- Valve (Publisher) (3 members)
- Vanguard Games (Developer) (1 member)
- Vanillaware (Developer) (2 members)
- Vatra Games (Developer) (2 members)
- Vblank Entertainment (Developer) (2 members)
- Vblank Entertainment (Publisher) (2 members)
- Vblank rate (Config) (30 members)