| Company name | Description | Games | 
|---|---|---|
                        Gamos Ltd. | 
                    7 Colors, Filler, Kalah, Color Lines, Columbus Discovery, From Corner to Corner, Regatta, Tanks' Destroyer, Sky Cat | |
                        Gamtech
                                Gamtech Software was founded in 1987 by Doug Gamble, when the first two Commodore 64/128 shareware titles were released: Oakflat Nuclear Reactor Simulator and The Number Machine. In 1992 both the games were released for DOS platform and a few years later Oakflat Nuclear Reactor Simulator was ported to the Windows platform.
In recent years the company has focused on encryption software and GUI enhancements.
                             
                         | 
                    The Oakflat Nuclear Power Plant Simulator | |
                        Gang of Five | 
                    Risk - The World Conquest Game | |
                        Garry F. Taylor | 
                    Toad | |
                        Geckosoft | 
                    Fracas | |
                        Gee Whiz! Entertainment
                                Gee Whiz! Entertainment was a development studio based in Brisbane, Australia. It was formed in 1996 by the partners John Passfield and Steve Stamatiadis.
                             
                         | 
                    Zombie Wars | |
                        Gene Brown | 
                    Battle Charge | |
                        General Quarters Software | 
                    Midway: The Battle that Doomed Japan, Battleship Bismarck | |
                        Genias | 
                    Tilt | |
                        GENKI Software Corporation | 
                    386 Spys | |
                        Geoff Crammond | 
                    The Sentry | |
                        Geoffrey Silverton | 
                    Tunneler | |
                        Georg Zimmer | 
                    SDI: Strategic Defense Initiative | |
                        German Design Group | 
                    Heirs to the Throne, Spoils of War | |
                        Godly Games | 
                    Jesus Matchup, Moses Matchup | |
                        Golden Goblins
                                Golden Goblins, located in Germany, is a publishing label of Rainbow Arts.
                             
                         | 
                    M.U.D.S. - Mean Ugly Dirty Sport, Circus Attractions, Grand Monster Slam | |
                        Golden Sector Design | 
                    Discovery: In the Steps of Columbus | |
                        Golem Roznov p.R | 
                    Vlak | |
                        Goliath Games | 
                    World Championship Boxing Manager | |
                        Graftgold Ltd. | 
                    Empire Soccer 94, Realms | |