| Sony PlayStation CD |  Moebius Link 3D Model SLPS-01281 | 1998 | Itochu Corp. Japan |
| Sega Saturn CD | Mogitate SegaSaturn Vol. 2 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Mogitate SegaSaturn Vol. 3 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Mogitate SegaSaturn Vol. 4 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Mogitate SegaSaturn Vol. 5 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Slot Machine | Momotaro 6-Card model | 1998 | GPS Co., Ltd. Game Power System Taiwan |
| Sony PlayStation CD | Momotarou Densetsu Model SLPS-01785 | 1998 | Hudson Soft. Hudson Group Japan |
| Nintendo Game Boy Cart. | Momotarou Dentetsu Jr. - Zenkoku Ramen Meguri no Maki Model DMG-AD8J-JPN | 1998 | Hudson Soft. Hudson Group Japan |
| Slot Machine | Money Fever | 1998 | WMS Gaming, Inc. Chicago, IL, USA |
| Sony PlayStation CD | Money Idol Exchanger Model SLPS-00963 | 1998 | Athena Co., Ltd. Japan |
| Video Slot Machine | Money Mouse | 1998 | Aristocrat Leisure Industries Pty, Ltd. |
| Sony PlayStation CD |  Monkey Hero - Trade Demo Model SLUS-80765 | 1998 | Take-Two Interactive |
| Commodore C64 disk | Monkey Match | 1998 | J&F Publishing, Inc. |
| Slot Machine | Monopoly - Once Around | 1998 | WMS Gaming, Inc. Chicago, IL, USA |
| Nintendo Game Boy Color cart. | Monopoly Model DMG-AHAJ-JPN | 1998 | Hasbro Interactive, Inc. |
| Sony PlayStation CD |  Monopoly Model SLPS-00741 | 1998 | Hasbro Interactive, Inc. |
| Pinball | Monster Bash | 1998 | Williams Electronics Games, Inc. Chicago, IL, USA |
| Sony PlayStation CD | Monster Farm 2 - Tentou Houei-you Demonstration CD-ROM Model Japan | 1998 | Tecmo, Ltd. Tokyo, Japan |
| Nintendo Game Boy Cart. | Monster Race Okawari Model DMG-AMFj-JPN | 1998 | KOEI Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Monster Race Model DMG-AMRJ-JPN | 1998 | KOEI Co., Ltd. Japan |
| Sony PlayStation CD | Monster Race Model SLPM-86143 | 1998 | KOEI Co., Ltd. Japan |
| PC/MS-Windows CD | Monster Truck Madness 2 | 1998 | Microsoft |
| Sony PlayStation CD | MonsterSeed Model SLPS-01572 | 1998 | SUNSOFT Kounan, Japan |
| Slot Machine | Monte Carlo | 1998 | Compu-Games A.S. Esbjerg, Denmark |
| PC/MS-Windows CD | Montezuma's Return | 1998 | Take-Two Interactive |
| Nintendo Game Boy Cart. | Montezuma's Return! Model DMG-AMTP-EUR | 1998 | Take-Two Interactive |
| Nintendo Game Boy Color cart. | Montezuma's Return! Model DMG-AZME-USA | 1998 | Take-Two Interactive |
| Nintendo Game Boy Color cart. | Montezuma's Return! Model DMG-AZMP-EUR | 1998 | Take-Two Interactive |
| MSX 2 disk | Moon Landing | 1998 | Unknown Japan |
| PC/MS-Windows CD | Moon Model XING000059 | 1998 | Xing Ent. Japan |
| Nintendo 64 cart. | Morita Shougi 64 Model NUS-NMSJ | 1998 | Seta Co., Ltd. Japan |
| Sony PlayStation CD | Moritaka Chisato - Safari Tokyo Model SLPM-86130~1 | 1998 | KOEI Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Mortal Kombat & Mortal Kombat II Model DMG-AK2J-JPN | 1998 | Starfish, Inc. Japan |
| Famiclones cart. | Mortal Kombat 3 - Special 56 People Model JY-074 | 1998 | JY Co. |
| PC/MS-Windows CD | Mortal Kombat 4 | 1998 | GT Interactive Soft. Corp. NY, USA |
| Nintendo Game Boy Color cart. | Mortal Kombat 4 Model DMG-A4KD-NOE | 1998 | Midway Home Ent. |
| Nintendo Game Boy Color cart. | Mortal Kombat 4 Model DMG-A4KE-USA | 1998 | Midway Home Ent. |
| Nintendo 64 cart. | Mortal Kombat 4 Model NUS-NM4E-USA | 1998 | Midway Home Ent. |
| Nintendo 64 cart. | Mortal Kombat 4 Model NUS-NMP4-EUR | 1998 | GT Interactive Soft. Corp. NY, USA |
| Sony PlayStation CD | Mortal Kombat 4 Model SLES-01349 | 1998 | GT Interactive Soft. Corp. NY, USA |
