| Nintendo Game Boy Cart. |  Goukaku Boy Series - 99 Nendo Ban Eitango Center 1500 | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Gakken - Kanyouku Kotowaza 210 Model DMG-AK7J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Gakken - Rekishi 512 Model DMG-AR3J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Gakken - Yojijukugo 288 Model DMG-AY3J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Kirihara Shoten Hinshutsu Eibunpou Gohou Mondai 1000 Model DMG-AG4J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Shikakui Atama o Marukusuru - Suuji de Asobou Sansuu-Hen Model DMG-AM5J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Yamakawa Ichimonittou - Nihonshi B Yougo Mondaishuu Model DMG-AN4J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Yamakawa Ichimonittou - Sekaishi B Yougo Mondaishuu Model DMG-AW4J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Z Kai <Reibun de Oboeru> Chuugaku Eigo 1132 Model DMG-AJ3J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Goukaku Boy Series - Z Kai <Reibun de Oboeru> Kyuukyoku no Komon Tango Model DMG-AP7J-JPN | 1998 | Imagineer Co., Ltd. Japan |
| Arcade Video game | Gourmet Battle Quiz Ryouri-ou CooKing | 1998 | Visco Corp. Kyoto, Japan |
| Redemption mechanical game | Grab-N-Go | 1998 | ICE Innovative Concepts in Ent. Buffalo, NY, USA |
| Sony PlayStation CD |  Gran Turismo demo Model SCED-01279 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Gran Turismo Demo Model SCUS-94257 | 1998 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation CD |  Gran Turismo Model SCES-00984 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Gran Turismo Model SCUS-94194 | 1998 | Sony Computer Ent. America SCEA CA, USA |
| Slot Machine | Granada | 1998 | ADP Merkur GmbH Gauselmann Group Germany |
| Video Slot Machine | Grand Prix 98 | 1998 | Romtec Co., Ltd. |
| PC/MS-Windows CD | Grand Prix Legends | 1998 | Sierra Ent., Inc. USA |
| Sony PlayStation CD | Grand Theft Auto Model SLPS-01554 | 1998 | Syscom Ent. Japan |
| Sony PlayStation CD | Grand Theft Auto Model SLUS-00106 | 1998 | Take-Two Interactive |
| Nintendo Game Boy Cart. | Grander Musashi RV Model DMG-ARVJ-JPN | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Grandia - Digital Museum | 1998 | Game Arts Co., Ltd. Japan |
| Sony PlayStation CD | Granu-shima! Daibouken Model SLPS-01624 | 1998 | Shuwa System Trading |
| Fruit Machine | Great Escape Club | 1998 | Maygay Machines, Ltd. |
| Sony PlayStation CD | Great Hits Taikenban Model SLPM-80313 | 1998 | Enix Corp. |
| Sony PlayStation CD | Great Hits Model SLPM-86125 | 1998 | Enix Corp. |
| Sony PlayStation CD | Great Rugby Jikkyou '98 - World Cup e no Michi Model SLPS-01268 | 1998 | DaZZ Japan |
| PC/MS-Windows CD | Grim Fandango Model 1091801 | 1998 | LucasArts Ent. Co. |
| Sony PlayStation CD | Groove Jigoku V - Sweepstation Version Model SLPS-01205 | 1998 | Sony Music Ent., Inc. Japan |
| Sega Saturn CD | GT 24 | 1998 | JALECO Co., Ltd. Japan |
| Nintendo 64 cart. | GT64 - Championship Edition | 1998 | Ocean Soft., Ltd. 13156 |
| Sega ST-V cart. | Guardian Force Model 610-0374-95 | 1998 | Success Japan |
| Sega Saturn CD | Guardian Force Model T-9905G | 1998 | Success Japan |
| Sony PlayStation CD | Guardian Recall - Shugojuu Shoukan Model SLPS-01297~8 | 1998 | Xing Ent. Japan |
| Arcade Video game | Guardian Storm | 1998 | Apple Industries, Inc. Baychester, NY, USA |
| PC/MS-Windows CD | Guardian's Sword | 1998 | TGL Technical Group Laboratory Japan |
| Sony PlayStation CD | Gubble Model SLPS-01537 | 1998 | ASK Kodansha Co., Ltd. Japan |
| Sony PlayStation CD | Guilty Gear Taikenban Model SLPM-80302 | 1998 | Arc System Works |
| Sony PlayStation CD | Guilty Gear Model SLPS-01357 | 1998 | Arc System Works |
