The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Accel World (Series) (2 members)
- Access Games (Developer) (2 members)
- Accurate GETLLAR: On (Config) (0 members)
- Accurate LLVM DFMA: Off (Config) (1 member)
- Accurate PPU 128 reservations: Always Enabled (Config) (1 member)
- Accurate RSX reservation access: On (Config) (19 members)
- Accurate SPU DMA: On (Config) (2 members)
- Ace Combat (Series) (2 members)
- Acquire (Developer) (8 members)
- Acquire (Publisher) (7 members)
- Action (Genre) (426 members)
- Action role-playing (Genre) (77 members)
- Activision (Publisher) (126 members)
- Advanced Microcomputer Systems (Developer) (1 member)
- Adventure (Genre) (314 members)
- Adventure Time (Series) (3 members)
- Air Conflicts (Series) (3 members)
- Airtight Games (Developer) (3 members)
- Ak tronic Software & Services GmbH (Publisher) (1 member)
- Akabeisoft2 (Developer) (1 member)
- Akatsuki Works (Developer) (2 members)
- Aksys Games (Publisher) (19 members)
- Alawar Entertainment (Developer) (4 members)
- Alawar Entertainment (Publisher) (11 members)
- Alawar Stargaze (Developer) (3 members)
- Alchemist (Developer) (2 members)
- Alchemist (Publisher) (3 members)
- Aliasworlds Entertainment (Developer) (1 member)
- Alien Breed (Series) (4 members)
- Allow host gpu labels: On (Config) (1 member)
- Alpha Denshi (Developer) (2 members)
- Alvion (Developer) (1 member)
- Alvion (Publisher) (1 member)
- Amanita Design (Developer) (1 member)
- Amanita Design (Publisher) (1 member)
- American Laser Games (Developer) (3 members)
- American football (Genre) (27 members)
- Angry Birds (Series) (2 members)
- Anisotropic filter: 16x (Config) (3 members)
- Anisotropic filter: Auto (Config) (28 members)
- Anti-aliasing: Auto (Config) (2 members)
- Anti-aliasing: Disabled (Config) (12 members)
- ApolloSoft (Developer) (1 member)
- Aqua Plus (Publisher) (1 member)
- Aquaplus (Developer) (6 members)
- Aquaplus (Publisher) (7 members)
- Ar Tonecilo (Series) (1 member)
- Arc System Works (Developer) (16 members)
- Arc System Works (Publisher) (15 members)
- Arcade (Genre) (1 member)