| Slot Machine |  Model E873 | 1980 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | Model E873-4 | 1980 | Bally Mfg. Co. Chicago, IL, USA |
| Arcade Video game | Mole Hunter Cocktail Table model | 1980 | Data East Corp. Japan |
| Arcade Video game | Mole Hunter Upright model | 1980 | Data East Corp. Japan |
| Arcade Video game | Money Wars | 1980 | Hoei International, Inc. Japan |
| Video Slot Machine | Monkey Friend | 1980 | SNK Corp. Shin Nihon Kikaku Japan |
| TRS-80 type-in | Monster Maze | 1980 | SoftSide Publications, Inc. |
| Apple II cass. | Monster Maze Model MMS-479 | 1980 | Softape |
| Sharp MZ-80K cass. | Montage Model Z-1049 | 1980 | Hudson Soft. Hudson Group Japan |
| Arcade Video game | Monte Carlo | 1980 | Atari, Inc. CA, USA |
| Slot Machine | Monte Casino | 1980 | Compu-Games A.S. Esbjerg, Denmark |
| TRS-80 cass. | Monty Plays Monopoly | 1980 | Ritam Corp. |
| Arcade Video game | Moon Alien Part 2 Model AL-60001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Alien Part 2 Model ALA-6001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game |  Moon Cresta Cocktail Table model | 1980 | Karateco Tokyo, Japan |
| Arcade Video game | Moon Cresta Model 800-3121 | 1980 | Gremlin Ind, Inc. San Diego, CA, USA |
| Arcade Video game | Moon Cresta Model MC-50001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Cresta Model MCA-5001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Cresta Upright model | 1980 | Karateco Tokyo, Japan |
| Arcade Video game | Moon Quasar Model MQ-60001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Quasar Model MQA-6001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Raker Model MR-30001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Raker Model MRA-3001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Trek Model MT-80001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Arcade Video game | Moon Trek Model MTA-8001 | 1980 | Nichibutsu Nihon Bussan Co., Ltd. Osaka, Japan |
| Apple II type-in | Moonlanding | 1980 | SoftSide Publications, Inc. |
| Tangerine Oric 1 type-in | Morpion | 1980 | Shift Editions Paris, France |
| Handheld game | Moto Cross | 1980 | Tomy |
| Atari 400/800 type-in | Motorcycle Maze | 1980 | ANALOG Computing |
| TRS-80 type-in | Moving Maze | 1980 | SoftSide Publications, Inc. |
| Arcade Video game | Mr. Gun-Man | 1980 | Universal Co., Ltd Tokyo, Japan |
| Wall game | Mr. Memory | 1980 | Compu-Games A.S. Esbjerg, Denmark |
| Handheld game | Mr. Subattack Model 16147 | 1980 | Bandai Co., Ltd. Japan |
| Slot Machine | Multi 5 Matic | 1980 | Compu-Games A.S. Esbjerg, Denmark |
| Handheld game | Multi-Sport 7 Model 426 | 1980 | Koala |
| Slot Machine | Multimat Profistar | 1980 | Wulff, Günter Berlin, Germany |
| Texas instrument TI-99/4A cart. | Music SDA | 1980 | Texas Instruments |
| Tabletop game | Musical Marvin Model 6014 | 1980 | Entex Industries, Inc. Compton, CA, USA |
| Heath/Zenith H8 soft. | Mychess | 1980 | Software Toolworks, The |
| TRS-80 disk | Mychess P | 1980 | Unknown |
