The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- Hydravision Entertainment (Developer) (4 members)
- Hydravision Entertainment (Publisher) (1 member)
- Hyperdimension Neptunia (Series) (3 members)
- I-Friqiya (Developer) (1 member)
- I-Friqiya (Publisher) (1 member)
- IO Interactive (Developer) (5 members)
- ISquared Games (Developer) (1 member)
- ISquared Games (Publisher) (1 member)
- Id Software (Developer) (3 members)
- Idea Factory (Developer) (11 members)
- Idea Factory (Publisher) (5 members)
- Idol Minds (Developer) (3 members)
- Ignition Entertainment (Publisher) (7 members)
- Ignition Tokyo (Developer) (1 member)
- Ilusis Interactive Graphics (Developer) (1 member)
- Ilusis Interactive Graphics (Publisher) (1 member)
- Imageepoch (Developer) (1 member)
- Images (1 member)