The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Point-and-click (Genre) (13 members)
- Point of View (Developer) (1 member)
- Polyphony Digital (Developer) (5 members)
- Polytron Corporation (Developer) (1 member)
- PomPom Games (Developer) (1 member)
- PomPom Software (Developer) (1 member)
- PomPom Software (Publisher) (1 member)
- PopCap Games (Developer) (7 members)
- PopCap Games (Publisher) (5 members)
- Power Pros Production (Developer) (10 members)
- Power and Magic Development (Developer) (1 member)
- Preferred SPU threads (Config) (6 members)
- Premium Agency (Developer) (1 member)
- Press Play (Developer) (1 member)
- Press Play (Publisher) (1 member)
- Prince of Persia (Series) (4 members)
- Pro Evolution Soccer (Series) (11 members)
- Professional Baseball Spirits (Series) (9 members)
- Project Aces (Developer) (2 members)
- Project Soul (Developer) (1 member)
- Propaganda Games (Developer) (2 members)
- Prope (Developer) (1 member)
- Proper Games (Developer) (1 member)
- 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)
- Quirkat (Developer) (1 member)
- Quirkat (Publisher) (1 member)
- RSX FIFO accuracy: Atomic (Config) (71 members)
- RSX FIFO accuracy: Ordered & Atomic (Config) (4 members)
- RTL Interactive (Publisher) (1 member)
- Racing (Genre) (149 members)
- Radical Entertainment (Developer) (2 members)