The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Accurate GETLLAR: On (Config) (10 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)