The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Prototype (Publisher) (4 members)
- Prototype (Series) (2 members)
- Pseudo Interactive (Developer) (1 member)
- Psyonix (Developer) (2 members)
- Psyonix (Publisher) (1 member)
- Publishers (137 members)
- Puppy Games (Developer) (2 members)
- Puzzle (Genre) (132 members)
- Puzzle Quest (Series) (3 members)
- Pwnee Studios (Developer) (1 member)
- Pyro Studios (Developer) (1 member)
- Q-Games (Developer) (8 members)
- Q-Games (Publisher) (5 members)
- QV Software (Publisher) (1 member)
- Q Entertainment (Developer) (3 members)
- Q Entertainment (Publisher) (3 members)
- QuByte Interactive (Developer) (1 member)
- QuByte Interactive (Publisher) (1 member)
- Quantic Dream (Developer) (2 members)
- Queasy Games (Developer) (2 members)