The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Pages using vgregion with named parameters (1 member)
- Pages with broken file links (1 member)
- Pages with too many expensive parser function calls (0 members)
- Pandemic Studios (Developer) (3 members)
- Paon Corporation (Developer) (1 member)
- Paon Corporation (Publisher) (1 member)
- Papaya Studio (Developer) (2 members)
- Paradigm Entertainment (Developer) (1 member)
- Paradox Interactive (Publisher) (2 members)
- Paramount Digital Entertainment (Publisher) (4 members)
- Party (Genre) (24 members)
- Patches available (265 members)
- Payday (Series) (2 members)
- Pelfast (Developer) (1 member)
- Pelfast (Publisher) (1 member)
- People Can Fly (Developer) (1 member)
- Persona (Series) (3 members)
- Phoenix Studio (Developer) (1 member)
- Pi Studios (Developer) (1 member)
- Piacci (Publisher) (1 member)
- Pieces Interactive (Developer) (2 members)
- Pinball (Genre) (7 members)
- Pipeworks Software (Developer) (6 members)
- Pipeworks Studios (Developer) (1 member)
- Piranha Bytes (Developer) (1 member)
- Piranha Games (Developer) (1 member)
- Pivotal Games (Developer) (1 member)
- PixelJunk (Series) (8 members)
- Pixel Tales (Developer) (1 member)
- Pixelnest Studio (Developer) (1 member)
- Pixelopus (Developer) (1 member)
- Pixolane (Developer) (1 member)
- Pixolane (Publisher) (1 member)
- Plants vs. Zombies (Series) (1 member)
- Plastic (Developer) (2 members)
- Platform (Genre) (168 members)
- Platine Dispositif (Developer) (1 member)
- PlatinumGames (Developer) (7 members)
- PlayStation 3 exclusive (Release type) (304 members)
- PlayStation exclusive (Release type) (186 members)
- Playbrains (Developer) (2 members)
- Playdead (Developer) (1 member)
- Playdead (Publisher) (1 member)
- Playlogic Entertainment (Developer) (4 members)
- Playlogic Entertainment (Publisher) (1 member)
- Playlogic Game Factory (Developer) (1 member)
- Playlogic International (Publisher) (1 member)
- Playrix Entertainment (Developer) (1 member)
- Plug In Digital (Publisher) (1 member)
- Plunge Interactive (Developer) (1 member)