| Galactic Crusader | AS | 1990 |
Bunch Games | Unlicensed |
| Galactic Crusader | US | 1990 |
Bunch Games | Unlicensed |
| Grand Combat | AS | 1990 |
| Unlicensed |
| Ganbare Goemon Gaiden - Kieta Ougon Kiseru | JP | 1990-01 |
Konami | Commercial |
| Genghis Khan | US | 1990-01 |
Infogrames | Commercial |
| Ghostbusters II | US | 1990-04 |
Activision | Commercial |
| Ghostbusters III | AS | 1990-04 |
| Unlicensed |
| God Slayer - Haruka Tenkuu no Sonata | JP | 1990-04 |
SNK | Commercial |
| Gunhed - Aratanaru Tatakai | JP | 1990-04-13 |
Varie | Commercial |
| Golgo 13 - Dainishou - Icarus no Nazo | JP | 1990-07 |
Vic Tokai | Commercial |
| Game Party | JP | 1990-08-03 |
Coconuts Japan | Commercial |
| Garry Kitchen's Battletank | US | 1990-09 |
Absolute Entertainment | Commercial |
| Gauntlet II | US | 1990-09 |
Mindscape | Commercial |
| Gremlins 2 - The New Batch | US | 1990-10 |
Sunsoft | Commercial |
| Gremlins 2 - The New Batch | US | 1990-10 |
Sunsoft | Prototype |
| Gun Nac | JP | 1990-10-05 |
ASCII Corporation | Commercial |
| Gambler Jiko Chuushinha 2 | JP | 1990-12 |
Asmik Ace Entertainment | Commercial |
| Gekikame Ninja Den | JP | 1990-12 |
Konami | Commercial |
| Gremlin 2 - Shinshu Tanjou | JP | 1990-12 |
Sunsoft | Commercial |
| Ghostbusters II | EU | 1990-12-07 |
Activision | Commercial |
| Great Boxing - Rush Up | JP | 1990-12-07 |
Romstar | Commercial |