The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Atlus (Publisher) (16 members)
- Atlus USA (Publisher) (7 members)
- Atomic Elbow (Developer) (1 member)
- Audio buffer duration (Config) (6 members)
- Audio format: Automatic (Config) (1 member)
- Augmented reality (Genre) (4 members)
- Australia (Release region) (637 members)
- Autumn Games (Publisher) (2 members)
- Avalanche Software (Developer) (7 members)
- Avalanche Studios (Developer) (2 members)
- AyeWARE (Publisher) (1 member)
- B.B. Studio (Developer) (9 members)
- B.B Studio (Developer) (1 member)
- BBC Worldwide (Publisher) (1 member)
- BaKno Games (Developer) (1 member)
- BaKno Games (Publisher) (1 member)
- Backbone Entertainment (Developer) (15 members)
- Backbreaker (Series) (2 members)
- Bad Robot Interactive (Developer) (1 member)
- Badland Games (Publisher) (1 member)