The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Commodore Amiga (1 member)
- Commodore Gaming (2 members)
- ConsoleWay (1 member)
- Crave (1 member)
- Crea-ture Studios Inc. (2 members)
- Crystal Int. (1 member)
- Curve Digital Publishing Limited (2 members)
- Daniel Krusi (1 member)
- Dc (3 members)
- Devolver Digital, Inc. (8 members)
- DigiBLAST (1 member)
- DigitalProduce (1 member)
- Disney (3 members)
- Distinctive Developments Ltd. (4 members)
- Dos (5 members)
- EPYX, Inc. (11 members)
- Easy Day Studios Pty Ltd (2 members)
- Edge of Reality (3 members)
- Eidos Mobile (1 member)
- Electronic Arts (19 members)
- EntropicOrder (1 member)
- Fake Skate (1 member)
- Fingerlab SARL (5 members)
- FireOS (1 member)
- Fireos (1 member)
- Fox Interactive (1 member)
- Frosch Media Pty. Ltd. (3 members)
- Frosty Pop Games Inc. (4 members)
- Fuel Games (2 members)
- Future Designs (1 member)
- G-mode Co., Ltd. (2 members)
- GNU/Linux (2 members)
- Gameloft (1 member)
- Gb (2 members)
- Gba (10 members)
- Gbc (10 members)
- Gearbox (1 member)
- Glu Mobile, Inc. (3 members)
- Good Shepherd Entertainment (1 member)
- Gremlin Graphics Software Limited (3 members)
- Grey Digital (1 member)
- Grey Matter (1 member)
- Grom Social, Inc (2 members)
- GungHo Online Entertainment, Inc. (3 members)
- Hidden categories (1 member)
- Hugo Games A/S (3 members)
- Illusion Labs AB (6 members)
- Imported vocabulary (7 members)
- Infogrames North America (1 member)
- Infospace (1 member)