The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Giants Software (Developer) (2 members)
- Go! Sports (Series) (1 member)
- God of War (Series) (4 members)
- Golden Axe (Series) (2 members)
- Golden Ruby Games (Developer) (1 member)
- Gonzo Games (Developer) (1 member)
- Gotch Technology (Developer) (1 member)
- Gran Turismo (Series) (5 members)
- Grand Theft Auto (Series) (4 members)
- 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)