The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- HandCircus (Publisher) (1 member)
- Handball (Series) (2 members)
- Handle RSX memory tiling: On (Config) (15 members)
- Happinet Corporation (Publisher) (1 member)
- Happy Dance Games (Developer) (1 member)
- Happy Dance Games (Publisher) (1 member)
- Harmonix (Developer) (13 members)
- Harmonix (Publisher) (3 members)
- Harry Potter (Series) (4 members)
- Hasbro Family Game Night (Series) (3 members)
- Hatsune Miku: Project DIVA (Series) (5 members)
- Headstrong Games (Developer) (2 members)
- Headup Games (Publisher) (1 member)
- Heavy Fire (Series) (2 members)
- Heavy Iron Studios (Developer) (5 members)
- Hello Games (Developer) (2 members)
- Hello Games (Publisher) (2 members)
- HexaDrive (Developer) (2 members)
- Hidden Path Entertainment (Developer) (1 member)
- High Impact Games (Developer) (2 members)
- High Moon Studios (Developer) (6 members)
- High Voltage Software (Developer) (3 members)
- Hijinx Studios (Developer) (3 members)
- Hit Maker (Developer) (1 member)
- Hitbox Team (Developer) (1 member)
- Hitmaker (Developer) (1 member)
- Hitman (Series) (3 members)
- Honeyslug (Developer) (1 member)
- Horror (Genre) (2 members)
- Hot Shots Golf (Series) (2 members)
- Hothead Games (Developer) (5 members)
- Hothead Games (Publisher) (1 member)
- Hotline Miami (Series) (2 members)
- Housemarque (Developer) (4 members)
- Hudson Soft (Developer) (3 members)
- Hudson Soft (Publisher) (6 members)
- HumaNature Studios (Developer) (1 member)
- Hunter's Trophy (Series) (4 members)
- Hunting (Genre) (16 members)