| Arcade Video game |  Mahjong Gakuen-sai 2 | 1998 | Make Soft., Inc. Japan |
| Sega Saturn CD | Mahjong Gakuen-sai DX - Zenjitsu ni Matsuwaru Funsenki | 1998 | Make Soft., Inc. Japan |
| Arcade Video game | Mahjong Long Hu Zheng Ba 2 | 1998 | IGS Co., Ltd. International Game System |
| Arcade Video game | Mahjong Man Guan Cai Shen | 1998 | IGS Co., Ltd. International Game System |
| Arcade Video game |  Mahjong Nenrikishu SP | 1998 | IGS Co., Ltd. International Game System |
| Nintendo Game Boy Color cart. | Mahjong Quest Model DMG-AMJJ-JPN | 1998 | J-Wing |
| Medal video game | Mahjong Reach Ippatsu | 1998 | Nihon System, Inc. |
| Arcade Video game | Mahjong Shuang Long Qiang Zhu 2 | 1998 | IGS Co., Ltd. International Game System |
| Medal video game | Mahjong Zhong Hua Er Nu Model D12002-4 | 1998 | Dynax, Inc. Nagoya, Japan |
| Sega Saturn CD | Mahou Shoujo Pretty Samy - Heart no Kimochi Model T-20112G | 1998 | Nec InterChannel, Ltd. Japan |
| Sega Saturn CD | Mahoutsukai ni Naru Houhou Model T-32510G | 1998 | TGL Technical Group Laboratory Japan |
| Pachislot | Mai Mai | 1998 | Yamasa Japan |
| Sony PlayStation CD | Mainichi Neko Youbi Model SLPS-01249 | 1998 | Bandai Co., Ltd. Japan |
| Nintendo 64 cart. | Major League Baseball featuring Ken Griffey Jr. | 1998 | Nintendo Co., Ltd. Japan |
| Slot Machine | Make me Rich | 1998 | WMS Gaming, Inc. Chicago, IL, USA |
| NEC PC-FX game | Makeruna! Makendou Z Model FXNHE744 | 1998 | NEC Home Electronics, Ltd. |
| PC/MS-Windows CD | Mana | 1998 | Virgin Interactive Ent., Ltd. UK 013715 |
| Cambridge Z88 Cart. | Manic Miner '88 Hb | 1998 | Unknown |
| Sinclair ZX Spectrum cass. | Manic Miner 6 - The Buddha of Suburbia Hb | 1998 | Broadsoft |
| Sony PlayStation CD | Marie no Atelier Plus - Salberg no Renkinjutsushi Model SLPS-01418 | 1998 | Gust Japan |
| Nintendo 64 cart. | Mario no Photopie Model NUS-NMPJ | 1998 | Tokyo Electron |
| Nintendo 64 cart. | Mario Party Model NUS-CLBJ | 1998 | Nintendo Co., Ltd. Japan |
| Sony PlayStation CD |  Marl Oukoku no Ningyou-hime - The Adventure of Puppet Princess Taikenban Model SLPM-80319 | 1998 | Nippon Ichi Soft., Inc. Japan |
| Sony PlayStation CD | Marl Oukoku no Ningyou-hime - The Adventure of Puppet Princess Model SLPS-01734 | 1998 | Nippon Ichi Soft., Inc. Japan |
| Sega Saturn CD | Marvel Super Heroes vs. Street Fighter P | 1998 | Capcom Co., Ltd. Japan |
| Sony PlayStation CD | Marvel Super Heroes vs. Street Fighter - EX Edition Taikenban Model SLPM-80376 | 1998 | Capcom Co., Ltd. Japan |
| Sony PlayStation CD | Marvel Super Heroes vs. Street Fighter - EX Edition Taikenban Model SLPM-80382 | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. |  Marvel vs. Capcom - Clash of Super Heroes Black Board | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. | Marvel vs. Capcom - Clash of Super Heroes Blue Board | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. | Marvel vs. Capcom - Clash of Super Heroes Green Board | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. | Marvel vs. Capcom - Clash of Super Heroes Grey Board | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. | Marvel vs. Capcom - Clash of Super Heroes Orange Board | 1998 | Capcom Co., Ltd. Japan |
| Capcom CPS-II cart. | Marvel vs. Capcom - Clash of Super Heroes Pink Board | 1998 | Capcom Co., Ltd. Japan |
| Slot Machine | Marylin | 1998 | Mega |
| Sony PlayStation CD | Master of Monsters - Disciples of Gaia Model SLES-00244 | 1998 | Agetec, Inc. Sunnyvale, CA, USA |
| Sony PlayStation CD | Master of Monsters - Disciples of Gaia Model SLUS-00595 | 1998 | ASCII Ent. Soft., Inc. USA |
| Sony PlayStation CD | Masumon Kids - The Another World of The Master of Monsters Model SLPS-01426 | 1998 | Toshiba EMI Japan |
| Video Slot Machine | Match 98 | 1998 | Amcoe, Inc. USA |
| Sony PlayStation CD | Math Gallery - Collection 1 Model LSP-903433 | 1998 | Lightspan Partnership, The |
| Commodore C64 disk | Mathball | 1998 | J&F Publishing, Inc. |
