| Nintendo GBA cart. |  Game Boy Wars Advance 1+2 Model AGB-BGWJ-JPN | 2004 | Nintendo Co., Ltd. Japan |
| Dedicated Console | Game Sporz Wireless Boxing | 2004 | Macro Winners |
| Dedicated Console | Game Sporz Wireless Tennis | 2004 | Macro Winners |
| Pachislot | GAMERA High Grade Vision | 2004 | Rodeo Corp. Japan |
| Video Slot Machine | Gangster's Roses | 2004 | Kupidon |
| Video Slot Machine | Garage | 2004 | Igrosoft |
| Nintendo GBA cart. | Garfield - The Search for Pooky Model AGB-BGOP-EUR | 2004 | Game Factory, The |
| Pachislot | Gattsu Da!! Mori no Ishimatsu | 2004 | Eleco, Ltd. Aruze Group Japan |
| Slot Machine | Gem 777 | 2004 | Unknown Korea |
| Slot Machine | Gem Daddy | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Gem Dandy | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Genie & The Sultan's Jewels | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Sky Gamestar game | Genie's Cave | 2004 | Sky Games |
| Pachinko | Genpei Kassen | 2004 | Newgin Japan |
| Nintendo GBA cart. | Genseishin Justirisers - Souchaku! Chikyuu no Senshi-tachi Model AGB-BGJJ-JPN | 2004 | Konami Corp. Japan |
| Slot Machine | Get Nuts | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Get Rich Quick | 2004 | IGT International Game Technologies Reno, NV, USA |
| Nintendo GBA cart. | Get Ride! Amdriver - Senkou no Hero Tanjou! Model AGB-BGIJ-JPN | 2004 | Konami Corp. Japan |
| Nintendo GBA cart. | Get Ride! Amdriver Shuggeki! Battle Party Model AGB-BGPJ-JPN | 2004 | Konami Corp. Japan |
| Slot Machine | Get Wealth Soon | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Get Wheel | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Get Your Two Cents Worth | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Ghost | 2004 | Mega |
| Slot Machine | Ghost Pirate | 2004 | Subsino Co., Ltd. |
| Arcade Video game | Ghost Squad | 2004 | SEGA Corp. |
| Medal video game | GI-Turf Wild 2 | 2004 | Konami Corp. Japan |
| Medal video game | Giant Sambar | 2004 | Unknown Korea |
| Slot Machine | Gift Horse | 2004 | IGT International Game Technologies Reno, NV, USA |
| Arcade Video game | Giga Wing Generations | 2004 | Taito Corp. Japan |
| Medal video game | Gigadrake | 2004 | Konami Corp. Japan |
| Slot Machine | Gilligan's Island | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Gina | 2004 | Bally Wulff |
| Nintendo GBA cart. | Gli Incredibili - Una 'Normale' Famiglia di Supereroi | 2004 | T-HQ, Inc. Toy HeadQuarters |
| MSX cart. | Gniffel Hb | 2004 | Dioniso |
| Slot Machine | Go & Stop | 2004 | Astro Corp. Taipei, Taiwan |
| Arcade Video game | GO 3000 Plus | 2004 | MD Korea |
| Arcade Video game | GO 3000 Plus 2 | 2004 | MD Korea |
| Slot Machine | Go Go Africa | 2004 | Subsino Co., Ltd. |
| Pachinko | Go! Go! GO | 2004 | Newgin Japan |
| Pachislot | Gogo Creator | 2004 | Kitac Kita Denshi Corp. Japan |
