| GSC World Publishing | Publisher | |
| GSI | Developer | |
| GT Games | Developer | |
| GT Interactive | DeveloperPublisher | |
| GT Interactive (EU) | Publisher | |
| GT Interactive NA | Publisher | |
| GT Interactive PAL | Publisher | |
| GT Interactive Software | Publisher | |
| GT Interactive Software Corp. | Publisher | |
| GT InteractiveNA | Publisher | |
| GT InteractivePAL | Publisher | |
| GTE Entertainment | DeveloperPublisher | |
| GTE ImagiTrek | Developer | |
| GTE Interactive Media | DeveloperPublisher | |
| GTE Vantage | Developer | |
| GTEKK | Developer | |
| GTI Software | Publisher | |
| GTS | Developer | |
| GTshine | Developer | |
| GULTI Co Ltd | Developer | |
| GURN GROUP | Developer | |
| GUSH: Currently Pink | Developer | |
| GV2 | Developer | |
| GW | Publisher | |
| GWME Software | DeveloperPublisher | |
| GWRon | Developer | |
| GWS | Developer | |
| GWoolley | Developer | |
| GXB Interactive | Developer | |
| G_Boy | Developer | |
| GaUni | Developer | |
| Gab | Developer | |
| GabLucas17 | Developer | |
| Gabe | Developer | |
| Gabe Cuzzillo | Developer | |
| Gabe Swarr | Developer | |
| GabeJamesGames | Developer | |
| GabeTheDeadFish | Developer | |
| Gabeee | Developer | |
| Gabi Pinto | Developer | |
| Gabiszon | Developer | |
| Gabitasoft Entertainment | DeveloperPublisher | |
| Gabor Laufer & Alexander Laufer | Developer | |
| Gabriel | Developer | |
| Gabriel Bradley | Developer | |
| Gabriel Cassimiro | Developer | |
| Gabriel Cencic | Developer | |
| Gabriel Cornish | Developer | |
| Gabriel Cortabraz | Developer | |
| Gabriel Cyrino | Developer | |
| Gabriel Dias | Developer | |
| Gabriel Entertainment | Developer | |
| Gabriel Grossi | Developer | |
| Gabriel LF | Developer | |
| Gabriel Lorenzo | Developer | |
| Gabriel Naves | Developer | |
| Gabriel Ortas | Developer | |
| Gabriel Padinha | Developer | |
| Gabriel Priske | Developer | |
| Gabriel Ranieri | Developer | |
| Gabriel Raposo | Developer | |
| Gabriel Robertson | Developer | |
| Gabriel Santini Quibao | Developer | |
| Gabriel Serra | Developer | |
| Gabriel Tanasovici Nardy | Developer | |
| Gabriel Toschi | Developer | |
| Gabriel Vidal | Developer | |
| Gabriel Villalonga | Developer | |
| GabrielFSilva | Developer | |
| GabrielHoltschlag | Developer | |
| GabrielNied | Developer | |
| GabrielSharp | Developer | |
| GabrielZanini | Developer | |
| Gabriel_cmf | Developer | |
| Gabriela Dall'Agnol | Developer | |
| Gabriela Gomes Rodrigues | Developer | |
| Gabrielle Bleu | Developer | |
| Gabura | Developer | |
| Gabxi | Developer | |
| GachZorn | Developer | |
| Gad | Developer | |
| Gadan Games | Developer | |
| Gaddy | Developer | |
| Gadget Soft | DeveloperPublisher | |
| GadgetPatch | Developer | |
| Gaeel | Developer | |
| Gaelco | DeveloperPublisher | |
| Gaffiti Entertainment | Publisher | |
| Gaga | DeveloperPublisher | |
| Gaga Communications | DeveloperPublisher | |
| Gaga Communications (JP) | Publisher | |
| Gaga Communications Inc. EU | Publisher | |
| Gaga CommunicationsJP | Publisher | |
| Gaga Interactive MediaPAL | Publisher | |
| GagaPete | Developer | |
| Gage | Developer | |
| Gage Bradley | Developer | |
| Gagne International) | Developer | |
| Gagne Software | DeveloperPublisher | |
| Gagonfe | Developer | |
| Gai Brain Y K | Developer | |
| Gaia Industries | Developer | |
| GaiaFL | Developer | |
| Gaiascope | Developer | |
| Gaibrain | Developer | |
| Gaijin Entertainment | DeveloperPublisher | |
| Gaijin Games | DeveloperPublisher | |
| Gainax | DeveloperPublisher | |
| Gainax Co. | DeveloperPublisher | |
| Gaiusglaber | Developer | |
| Gajanand Patel | Developer | |
| Gakken | DeveloperPublisher | |
| Gala-Net Inc | Publisher | |
| Galactic Bunny | Developer | |
| Galactic Cafe | DeveloperPublisher | |
| Galactic Games | Developer | |
| GalacticHypernova | Developer | |
| Galacticomm | Developer | |
| Galactodactyl | Developer | |
| Galamot Shaku | Developer | |
| Galanodell | Developer | |
| Galanos | Developer | |
| Galanx | Developer | |
| Galapagos RPG | Developer | |
| Galaxy Folks | Developer | |
| Galaxy Studios | Developer | |
| GalaxyDeveloper | Developer | |
| GalaxyTrail | DeveloperPublisher | |
| Galaxy_Tech | Developer | |
| Galcon | Publisher | |
| GaldorStudios | Developer | |
| Galdra Studios | Developer | |
| Gale | Developer | |
| Gale Force Games LLC | Developer | |
| Gale Pollard | Developer | |
| Galejade | Developer | |
| Galen Drew | Developer | |
| Galilea | Developer | |
| Galilea Games | Developer | |
| Gallagugar | Developer | |
| Gallahron | Developer | |
| Gallardo2D | Developer | |
| Gallium Games | Developer | |
| GalliumDev | Developer | |
| GalloCode | Developer | |
| Gallus | Developer | |
| Galo | Developer | |
| Galope | Developer | |
| Galoxyum | Developer | |
| Galse22 | Developer | |