The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Guerrilla Cambridge (Developer) (1 member)
- Guerrilla Games (Developer) (3 members)
- Guilty Gear (Series) (3 members)
- Guitar Hero (Series) (12 members)
- Gulti (Developer) (1 member)
- Gundam Breaker (Series) (2 members)
- Gundam VS (Series) (2 members)
- GungHo Online Entertainment (Publisher) (1 member)
- Gust (Developer) (1 member)
- Gust Co. Ltd. (Developer) (10 members)
- Gust Co. Ltd. (Publisher) (5 members)
- Gusto Games (Developer) (4 members)
- Guyzware (Developer) (1 member)
- H2 Interactive (Publisher) (1 member)
- HB Studios (Developer) (4 members)
- Hack and slash (Genre) (91 members)
- Hakuoki (Series) (2 members)
- Halfbrick Studios (Developer) (1 member)
- Hamster Corporation (Publisher) (1 member)
- HandCircus (Developer) (1 member)