| Handheld game |  Mini Sensory Chess Challenger | 1981 | Fidelity Electronics |
| Handheld game | Mini Vader | 197? | Nikko Japan |
| Handheld game | Mini Wizard | 1987 | VTECH Video Technology, Ltd. |
| Handheld game | Mini-Vid Break Free Model 97004 | 1979 | Mego Corp. |
| Handheld game | Mini-Vid Dodge City Gunfight Model 97003 | 1979 | Mego Corp. |
| Handheld game | Mini-Vid Sea Battle | 1979 | Mego Corp. |
| Handheld game | Mini-Vid Spacewar Model 97002 | 1979 | Mego Corp. |
| Handheld game | Miracle Baseball Model 8010 | 1980 | Bandai Co., Ltd. Japan |
| Handheld game | Miracle Pinball Model CG-250 | 1982 | Casio Computer Co., Ltd. |
| Handheld game | Missile Attack Model 2048 | 1977 | Mattel Electronics Mattel, Inc. |
| Handheld game | Missile Invader Model 16129 | 1980 | Bandai Co., Ltd. Japan |
| Handheld game |  Missile Invader Model 8002 | 1980 | Bandai Co., Ltd. Japan |
| Handheld game | Missile Strike | 198? | Tomy |
| Handheld game | Mission:Impossible Model MGA-299 | 1996 | MGA Micro Games of America |
| Handheld game | MIT Soccer | 1979 | MIT Management Investment & Technology Co. |
| Handheld game | Mobile Suit Gundam Model 16284 | 198? | Bandai Co., Ltd. Japan |
| Handheld game | Mobile Suit Z Gundam | 198? | Bandai Co., Ltd. Japan |
| Handheld game | Model 26 | 198? | Elektronika Russia |
| Handheld game | Model RG-28 | 198? | Ataboy |
| Handheld game | Mogland Model CG-60 | 1983 | Casio Computer Co., Ltd. |
| Handheld game | Money & Bomb Model CG-20 | 1983 | Casio Computer Co., Ltd. |
| Handheld game | Monkey | 1981 | VTECH Video Technology, Ltd. |
| Handheld game | Monkey | 198? | Acetronic |
| Handheld game | Monkey Business Model 8108 | 1981 | Bandai Co., Ltd. Japan |
| Handheld game | Monkey Jump | 1982 | VTECH Video Technology, Ltd. |
| Handheld game | Monkey Kingdom Model MK-33 | 1984 | Tronica |
| Handheld game | Monkey Kong Model SL-328M | 1984 | Unknown |
| Handheld game | Monkey See Model 60-1013 | 198? | Radio Shack Fort Worth, TX, USA |
| Handheld game | Monopoly | 1997 | Hasbro Interactive, Inc. |
| Handheld game | Monopoly | 1999 | WMS Gaming, Inc. Chicago, IL, USA |
| Handheld game | Monster Burger Model 7687 | 1983 | Tomy |
| Handheld game | Monster Game | 198? | Conic |
| Handheld game | Monster Maze Model 7-800 | 1982 | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Handheld game | Monster Panic | 1983 | ITMC France |
| Handheld game | Monster Panic Model 36520 | 1981 | Epoch Co., Ltd. Tokyo, Japan |
| Handheld game | Monty Plays Scrabble Model 66 | 1983 | Ritam Corp. |
| Handheld game | Moon Patrol | 199? | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Handheld game | Moon Patrol Model 81728 | 1982 | Gakken Japan |
| Handheld game | Mortal Kombat | 1993 | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Handheld game | Moto Cross | 1980 | Tomy |
