| G-Rev |
| G2 Games |
| G2M Games |
| G5 Software |
| Gaia |
| Gaijin Entertainment |
| Game Arts |
| Game Factory Interactive |
| Game Freak |
| Game Refuge |
| Game Republic |
| GameCO Studios |
| Gamecock Media Group |
| Gameloft |
| Gamepires |
| Games Faction |
| Games Farm |
| Gamigo |
| Gaming Minds |
| Garage Games |
| Gas Powered Games |
| Gastronaut Studios |
| Gathering of Developers |
| Gearbox Software |
| GenePool |
| Genki |
| Genuine Games |
| Ghost Games |
| Giant Sparrow |
| Global Star |
| GlyphX Games |
| GMX Media |
| Good-Feel |
| Gorilla Systems |
| Got Game Entertainment |
| Gotham Games |
| Graffiti Entertainment |
| Graphsim Entertainment |
| Grasshopper Manufacture |
| Gratuitous Games |
| Gravity |
| Gray Matter Studios |
| GreenScreen Interactive Software |
| Greenwave |
| GRIN |
| Grip Games |
| Griptonite Games |
| Groove Games |
| Grounding Inc. |
| GSC Game World |
| GT Interactive |
| Guerrilla Cambridge |
| Guerrilla Games |
| Guild Software |
| Guppyworks |
| Gust |
| Gusto Games |
