| 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 | |
| Galvanic Games | Developer | |
| Galvatron | Developer | |
| Gama | Developer | |
| Gamad | Developer | |
| Gamaelstrom | Developer | |
| Gamagami | Developer | |
| Gamagora | Developer | |
| Gamania | Publisher | |
| Gamanko | Developer | |
| Gamart | Developer | |
| Gamasoft | Developer | |
| Gamaturgie | Developer | |
| Gamba04 | Developer | |
| Gambiarra Games BR | Developer | |
| Gambitious | Publisher | |
| Gambitious Digital Entertainment | Publisher | |
| Gambitious Entertainment | Publisher | |
| Gambler172 | Publisher | |
| Gambrinous | Developer | |
| Game Addict | Publisher | |
| Game Alchemists | Developer | |
| Game Anatomy | Developer | |
| Game Arts | DeveloperPublisher | |
| Game Arts Co. | Developer | |
| Game ArtsJP | DeveloperPublisher | |
| Game Atelier | Developer | |
| Game Brains | Developer | |
| Game Buoy Games | Developer | |
| Game Bytes | DeveloperPublisher | |
| Game Crafters | DeveloperPublisher | |
| Game Crusaders | Developer | |
| Game Design Sweden AB | Developer | |
| Game Dev | Developer | |
| Game Dev Debbie | Developer | |
| Game Developer | Developer | |
| Game Dynasty | Developer | |
| Game Electronics | Publisher | |
| Game Endeavor | Developer | |
| Game Freak | DeveloperPublisher | |
| Game Freak Creatures Inc. | Developer | |
| Game Games | Developer | |
| Game Greg | Developer | |
| Game Grumps | DeveloperPublisher | |
| Game IN | Developer | |
| Game Invest | Developer | |
| Game Jolt | Publisher | |
| Game Jur | Developer | |
| Game Kitchen | Developer | |
| Game Kombinat | Developer | |
| Game Machine Studios | Developer | |