| Godzilla - Monster of Monsters! | EU | 1991 |
Toho | Commercial |
| G.I. Joe - A Real American Hero | US | 1991-01 |
Taxan USA Corp | Commercial |
| G.I. Joe - The Atlantis Factor | US | 1991-01 |
Taxan USA Corp | Prototype |
| Golf Grand Slam | JP | 1991-01-31 |
Atlus | Commercial |
| Galaxy 5000 - Racing in the 51st Century | EU | 1991-02 |
Activision | Commercial |
| Galaxy 5000 - Racing in the 51st Century | US | 1991-02 |
Activision | Commercial |
| Galaxy 5000 - Racing in the 51st Century | US | 1991-02 |
Activision | Prototype |
| Gremlins 2 - The New Batch | EU | 1991-02-21 |
Sunsoft | Commercial |
| Gremlins 2 - The New Batch | EU | 1991-02-21 |
Sunsoft | Prototype |
| Grand Master | JP | 1991-02-26 |
Varie | Commercial |
| Gun Sight | JP | 1991-03-15 |
Konami | Commercial |
| Gorby no Pipeline Daisakusen | JP | 1991-04-12 |
Tokuma Shoten | Commercial |
| Gauntlet II | EU | 1991-04-25 |
Mindscape | Commercial |
| Gun-Dec | JP | 1991-04-26 |
Sammy | Commercial |
| Game Designer Yousei Soft - Dezaemon | JP | 1991-09 |
Athena | Commercial |
| Gun Nac | US | 1991-09 |
ASCII Corporation | Commercial |
| Great Deal | JP | 1991-10-25 |
HectorSoft | Commercial |
| Gimmi a Break - Shijou Saikyou no Quiz Ou Ketteisen | JP | 1991-12 |
Yonezawa | Commercial |
| Golf Grand Slam | US | 1991-12 |
Atlus | Commercial |
| Golf Grand Slam | US | 1991-12 |
Hect | Prototype |