Haemimont
Haggard Games
Hanako Games
Handmark
Handy Games
Happy Happenings
Harebrained Schemes
Harmonix
Hasbro
Havas
Hayden Book Company
Head Games
Headfirst
Heavyreign
Henize Software
Her Interactive
Hewson
Hidden Sanctum
High Moon Studios
High Voltage
HipSoft
Hi-Tech Expr.
HMI
Honeysoft
HopeLab
Horizons
Horrorsoft
Housemarque
Howard W. Sams & Company
Hudson Soft USA
Hudson Soft
Human Code
Humanhead
Humongous Entertainment
Hussar Games
Hyperkat Games
Hypnotix
Note: bolded names indicate companies that released a game within the last twelve months.