The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Legacy parameters used (Config) (0 members)
- Lesta Studio (Developer) (1 member)
- Lesta Studio (Publisher) (1 member)
- Level-5 (Developer) (3 members)
- Level-5 (Publisher) (1 member)
- Lexis Numérique (Developer) (4 members)
- Lexis Numérique (Publisher) (5 members)
- Life simulation (Genre) (9 members)
- LightBox Interactive (Developer) (1 member)
- Lightning Fish (Developer) (3 members)
- Lionsfilm (Developer) (1 member)
- Lionsfilm (Publisher) (1 member)
- Liquid Entertainment (Developer) (3 members)
- LittleBigPlanet (Series) (6 members)
- Little Orbit (Developer) (1 member)
- Little Orbit (Publisher) (7 members)
- Live-Action (Genre) (1 member)
- Live Action Studios (Developer) (1 member)
- London Studio (Developer) (42 members)
- Longtail Studios (Developer) (1 member)
- Longtail Studios Québec (Developer) (1 member)
- Loose Cannon Studios (Developer) (1 member)
- Los 40 Principales: Karaoke Party (Series) (2 members)
- Lost Planet (Series) (4 members)
- Lua modules (14 members)
- Lucasarts (Developer) (3 members)
- Lucasarts (Publisher) (9 members)
- Lucid Games (Developer) (1 member)
- Ludia (Developer) (6 members)
- Ludia (Publisher) (6 members)
- Ludia Inc. (Developer) (1 member)
- Ludia Inc. (Publisher) (1 member)
- Lumenox EHF (Developer) (1 member)
- Lumenox EHF (Publisher) (1 member)
- Luxoflux (Developer) (2 members)
- M2 (Developer) (8 members)
- MLB: The Show (Series) (10 members)
- MLB 2K (Series) (7 members)
- MLB Advanced Media (Publisher) (1 member)
- MMO (Genre) (10 members)
- MOSS (Developer) (2 members)
- MOSS (Publisher) (1 member)
- MTV Games (Publisher) (9 members)
- MX vs. ATV (Series) (4 members)
- MachineGames (Developer) (1 member)
- Macross (Series) (3 members)
- Mad Catz Interactive (Publisher) (1 member)
- Mad Dog (Series) (1 member)
- Madagascar (Series) (3 members)
- Madden NFL (Series) (12 members)