| Gust Co. | DeveloperPublisher | |
| Gust Co. Ltd. | DeveloperPublisher | |
| Gust Corporation | Developer | |
| GustJP | Publisher | |
| Gustav | Developer | |
| Gustavo Fournier | Developer | |
| Gustavo Marciano | Developer | |
| Gusto Games | Developer | |
| GutPunch | Developer | |
| Guthen | Developer | |
| Guthix | Developer | |
| GutoGuerreiro | Developer | |
| Guts Department | DeveloperPublisher | |
| GutsAndEffort | Developer | |
| Gutter | Developer | |
| Gutter Arcade | Developer | |
| GuttyKreum | Developer | |
| Guy Stevens | Developer | |
| Guy Stevens. Ivon Horn | Developer | |
| Guy Unger | Developer | |
| GuyGershon | Developer | |
| GuyWithTeaCup | Developer | |
| Guygoo | Developer | |
| Guðni Natan Gunnarsson | Developer | |
| Gw1p | Developer | |
| Gwen | Developer | |
| Gwen Frey | DeveloperPublisher | |
| GwowGame! | Developer | |
| Gwoxenox | Developer | |
| Gwyndolyn Marchant | Developer | |
| GxGrainSon | Developer | |
| Gyaha | Developer | |
| Gyani Kumari | Developer | |
| Gymcrash | Developer | |
| GyoRisha | Developer | |
| Gyorgy Papp | Developer | |
| Gypopothomas | Developer | |
| Gypsy | Developer | |
| GyulGames | Developer | |
| Gywair | Developer | |
| Görkem Berka | Developer | |
| G̸l̸i̷t̴c̶h̸e̵d̵ ̷J̶s̵o̷n̴ | Developer | |
| H I M | Developer | |
| H. Hochkins | Developer | |
| H. Komatsu | Developer | |
| H.A.I. System | DeveloperPublisher | |
| H.A.L. Labs | Publisher | |
| H.A.R.T Games | Developer | |
| H.E.P. Group | Publisher | |
| H.H.Magoo | Developer | |
| H.P.N. | Developer | |
| H2 Interactive | DeveloperPublisher | |
| H2O Entertainment | Developer | |
| H2OPunks | Developer | |
| H4iry Bro | Developer | |
| H4plo | Developer | |
| H4rmey | Developer | |
| HACAH | Developer | |
| HAL America | Publisher | |
| HAL Corporation | Publisher | |
| HAL Laboratory | DeveloperPublisher | |
| HAL Laboratory JP | Publisher | |
| HAL Laboratory NA | Publisher | |
| HALPCat | Developer | |
| HANGAME | Publisher | |
| HARD | DeveloperPublisher | |
| HARD Software | DeveloperPublisher | |
| HARFANG®3D | Developer | |
| HAS-IT GAMES | Developer | |
| HAUO | Developer | |
| HB Studios | DeveloperPublisher | |
| HB Studios Multimedia | Developer | |
| HBaddict | Developer | |
| HCdev12 | Developer | |
| HD Publishing | Publisher | |
| HEAVENDELUXE | Developer | |
| HEGworks | Developer | |
| HER.E Game Studio | Developer | |
| HEYBUD | Developer | |
| HGM Studios | Developer | |
| HIDROXIDO STUDIOS | Developer | |
| HIZUVI | Developer | |
| HI_TV | Developer | |
| HK Spadez | Developer | |
| HK Studio | Developer | |
| HKstudios | Developer | |
| HLEBNY | Developer | |
| HLNunnelly | Developer | |
| HMH Hamburger Medien Haus | DeveloperPublisher | |
| HMH Interactive | Publisher | |
| HOF Studios | DeveloperPublisher | |
| HOGuru | Developer | |
| HOIman6321 | Developer | |
| HORSES' MUSIC-DOGS | Developer | |
| HOT | DeveloperPublisher | |
| HOT B | Developer | |
| HOU Mai | Developer | |
| HOWLITE Entertainment | Developer | |
| HR Games | Publisher | |
| HRGames | Developer | |