- G5 Software - Developers of Red Shark, Galaxy, and games for mobile devices.
- Gabriel Interactive - Contains news, game details, and job information.
- Game On - Developer of family computer games such as Billionaire and Carl's Classics [English, Svenska].
- GameOver-Games - Developers of PC action and puzzle games, including Brave Dwarves and Fox Jones. Contains news and game descriptions, with demonstration version downloads.
- Gameworld Seven Ltd. - Contains company information, work to date, and news.
- Ganymede Technologies - Developer for multiplayer online games sites.
- Gatorhole AB - Gatorhole is a game production company based in Stockholm, Sweden that focus entirely on large Internet multiplayer games.
- Gifted Minds - Makers of Adventure Maker. Includes help, tutorials, FAQ, free demos, schemes, screenshots and related links.
- GLIPS Entertainment, Inc. - Independent developer of PC games and screensavers for Windows.
- Goblineye Entertainment - An independent PC games developer. Site includes tool demos and project information.
- Graphic State - Developer of Star X, Dark Arena, and Zcube for GameBoy Advance. Offers information on their projects, press releases, and a selection Flash games.
- Green Ice - A software company that makes computer games. Site also competitions, newsletters, tutorials, and other products.