| Company | Based in | Founded | Industry |
|---|---|---|---|
| H.a.n.d. | Sapporo | February 26, 1993 | video game industry |
| H2 Interactive | — | September 4, 2009 | — |
| Hakama | Shibuya | 2018 | video game industry |
| Half Mermaid Productions | New York City | 2017 | video game industry |
| Half Past Yellow | Copenhagen | — | video game industry |
| Halfbot | London | 2010 | software industry |
| Hammer & Ravens | Tallinn | 2015 | video game industry |
| Hanako Games | — | 2003 | — |
| Hands-On Mobile | San Francisco | 2001 | video game industry |
| Hangonit Studio | Brno | — | video game industry |
| Hap inc. | Shibuya | March 6, 2007 | video game industry |
| Happy Broccoli Games | Berlin | — | video game industry |
| Happy Juice Games | — | — | video game industry |
| Happy Life Animation | — | — | — |
| HAPPYTUK Co., Ltd. | Xindian District | June 13, 2012 | — |
| Hardlight | — | 2012 | video game industry |
| Hasbro Interactive | Beverly | 1995 | video game industry |
| Hatinh Interactive | Paris | February 24, 2020 | video game publishing |
| HB Studios | Lunenburg | 2000 | video game industry |
| Headbang Club | Gond-Pontouvre | December 22, 2016 | video game publishing |
| Headlock | — | December 10, 1999 | video game industry |
| Headstrong Games | London | 2008 | — |
| Headware Games | Bristol | — | — |
| Heart Shaped Games | Ann Arbor | — | video game industry |
| Heavy Iron Studios | Los Angeles | 2005 | video game industry |
| Hellbent Games | Burnaby | 2006 | video game industry |
| Hello There Games | Gothenburg | — | video game industry |
| HESware | — | 1980 | video game industry |
| HexWar Games | Elgin | — | — |
| Hi-Rez Studios | Alpharetta | 2005 | video game industry |
| Hidden Trap | — | — | video game industry |
| High Moon Studios | San Diego | 2001 | video game industry |
| High Tea Frog | Gateshead | — | — |
| Himalaya Studios | Chandler | — | video game industry |
| Hit-Pak | — | — | video game industry |
| Hitcents | — | 1999 | video game industry |
| HitGrab | Toronto | — | — |
| Home Entertainment Suppliers | Riverwood | 1984 | video game industry |
| Homegrown Games | — | — | video game industry |
| Hooded Horse | — | — | video game industry |
| Hook | Milan | July 23, 2020 | video game industry |
| Horrible Guild Games | Milan | 2014 | — |
| Hot Lava Games | — | 2005 | — |
| HotGen | Croydon | 1999 | — |
| Hothouse Creations | Bristol | 1996 | — |
| Hudson Soft | Minato | May 18, 1973 | video game industry |
| Human Code | — | — | video game industry |
| HumanSoft | San Diego | 1994 | — |
| Humble Games | — | — | — |
| Humble Grove | — | — | — |
| Hummer Team | — | 1992 | video game industry |
| Hummingbird Soft | — | 1982 | video game industry |
| HuneX | Japan | October 1992 | video game industry |
| Hutch Games | London | July 4, 2011 | — |
| Hydra Games | Warsaw | — | video game industry |
| Hyper Productions | — | — | — |
| Hyperstrange | — | 2015 | — |
| Hyperware | — | — | video game industry |
| Hypnotix | Little Falls | 1993 | video game industry |