The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Graphic Adventure (Genre) (16 members)
- Grasshopper Manufacture (Developer) (5 members)
- Green Hill Games (Developer) (1 member)
- Grid (Series) (3 members)
- Grimm Bros (Developer) (1 member)
- Grimm Bros (Publisher) (1 member)
- Grin (Developer) (4 members)
- Grip Digital (Publisher) (1 member)
- Grip Games (Developer) (3 members)
- Grip Games (Publisher) (2 members)
- Griptonite Games (Developer) (7 members)
- 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)