| Ghostwhale Studio | Developer | |
| Ghostwind | Developer | |
| Ghouti | Developer | |
| Ghys Sudios | Developer | |
| Giack_ | Developer | |
| Giancarlo Taveira | Developer | |
| Giancarlo Valente | Developer | |
| Gianni Beninati | Developer | |
| Giannios A. | Developer | |
| Giant Army | Developer | |
| Giant Evil Robot | Developer | |
| Giant Interactive Entertainment | DeveloperPublisher | |
| Giant Margarita | DeveloperPublisher | |
| Giant Media Group | DeveloperPublisher | |
| Giant Monkey Robot | Developer | |
| Giant Sparrow | Developer | |
| Giant Squid | Developer | |
| Giant Squid Studios | Developer | |
| Giant Toad Software | DeveloperPublisher | |
| GiantEnemyLabs | Developer | |
| GiantPearl | Developer | |
| GiantWoman | Developer | |
| GiantWormStudios | Developer | |
| Giants Software | Developer | |
| Giantswing | Developer | |
| GibbonOfLiff | Developer | |
| GibbousGame | Developer | |
| Gideonnf | Developer | |
| Gift Ten Industry | Developer | |
| Gift-Games | Developer | |
| Giga | DeveloperPublisher | |
| Giga Games (Alan Laird, Ian Morrison) | Developer | |
| Gigabit Systems | DeveloperPublisher | |
| GiganticBurgers | Developer | |
| GigasDrop | Publisher | |
| Gigatech Studios | Developer | |
| Gigawatt Studios | Developer | |
| GigglesandGlasses | Developer | |
| Gigglywurx | Developer | |
| Gigi42 | Developer | |
| Gigoia Studios | Developer | |
| Giguz | Developer | |
| Gijs Westerdijk | Developer | |
| Gil Jaysmith | Developer | |
| Gil4 | Developer | |
| Gilazarini | Developer | |
| Gilberto Mayworm III | Developer | |
| GildedOctopusStudios | Developer | |
| Gildedguy | Developer | |
| Giles Williams | Developer | |
| Gillian Buckelew | Developer | |
| Gilman Louie | Developer | |
| Gimagin | Developer | |
| Gimmick House | DeveloperPublisher | |
| Gimmick Studios | Developer | |
| Gina | Developer | |
| Gina Al Halabi | Developer | |
| GingaIsland | Developer | |
| GingerBAUZ | Developer | |
| GingerEnslaver | Developer | |
| GingerPixels | Developer | |
| Gini Wren | Developer | |
| Ginkgo | Developer | |
| Gins | Developer | |
| Gioele Casazza | Developer | |
| Giome | Developer | |
| GiooG | Developer | |
| Giordano Nin | Developer | |
| Giorgio Malvone | Developer | |
| Giovanna Lopes | Developer | |
| Giovanni Morales | Developer | |
| Giovannigascot | Developer | |
| Gip Games | Developer | |
| Giphyy | Developer | |
| Gipzo | Developer | |
| Giraffe Cat | Developer | |
| Giratron | Developer | |
| Girls Make Games | Developer | |
| Giromancy | Developer | |
| Gitarion | Developer | |
| Gitch | Developer | |
| GiudarkGames | Developer | |
| Giulia Levada | Developer | |
| GiuliaC | Developer | |
| Giunti Multimedia | Publisher | |
| Gius Caminiti | Developer | |
| Givantaro Agusta | Developer | |
| Givro | Developer | |
| Givro Corporation | Developer | |
| Gixel Studio | Developer | |
| Gizmo Games | Developer | |
| Gizmo199 | Developer | |
| Gizmondo Eur Ltd | Publisher | |
| Gizmondo Games | Publisher | |
| Gizmondo Studios | Publisher | |
| Gizmondo Studios Manchester | Developer | |
| Giznads | Developer | |
| Glacierr | Developer | |
| Gladralf | Developer | |
| Glaikunt | Developer | |