DEVELOPERS
- G-Amusements
- G-Artists
- G-Artists / Sugar & Rockets
- G-Craft
- G.O.1
- G3 Interactive
- Gaelco, S.A. / Bit Managers
- Gaga
- Gaibrain
- Gainax
- Gakken (Gakushuu Kenkyuusha)
- Game Arts
- Game Arts / Alfa System
- Game Arts / Studio Alex
- Game Brains
- Game Design Sweden AB
- Game Freak
- Game Over
- Game-Play Studios
- Game Refuge
- Game Stage
- Game Studio
- Game Studio Infinity
- Game Titan
- Game Village
- GameBank
- GameHouse
- Games Express
- Games Workshop
- Gametec
- GameTek
- GameVillage
- GameVision
- Gameware Development
- Gamezlab
- Gamtec
- Ganbarion
- Gaps
- Garden
- Gasp
- Gau Entertainment
- Gaumont Multimedia
- Gazelle
- Gear Head Entertainment
- Gen Soft
- General Entertaiment
- General Entertainment
- General Entertainment / Dynamite
- General Support
- Genic
- Genki
- Genki Co. Ltd.
- Geo Factory
- GFX Construction
- Gigawatt Studios
- Givro
- Glams
- Glass Ghost
- Global A
- Global A Entertainment
- Global Entertainment / Marionette
- GMF
- Gorilla Games
- Gorilla Systems
- Graffiti
- Graftgold
- Granite Bay
- Granite Bay Software
- Graphic Research
- Graphic Research Co., Ltd
- Graphic State
- Grasshopper Manufacture
- Gratuitous Games
- Gravity-I
- Gray Matter
- Gray Matter Studios, Inc
- Gremlin Graphics
- Gremlin Interactive
- Gremlin Interactive Ltd
- Grey Matter
- Griptonite Games
- Grolier Interactive
- Groove Box Japan
- Group SNE
- GTE Entertainment
- Gu, Inc., Soliton Soft
- Gust
- GW
- GXB Interactive