| 40806 | Mastermind '80 | ZX80 | English |
| 41144 | Mastermind Challenge | ZX81 16K | English |
| 15605 | Masterwank | ZX-Spectrum 48K | English |
| 41202 | Matches | ZX81 16K | English |
| 34530 | Math Bash | ZX81 16K | English |
| 44077 | Math Gauntlet | ZX-Spectrum 48K | English |
| 9942 | Matrix | ZX-Spectrum 16K | English |
| 2152 | Matrix | ZX-Spectrum 48K | English |
| 16412 | Matrix | ZX-Spectrum 48K | Spanish |
| 38508 | Matrix | ZX-Spectrum 48K | Portuguese |
| 30414 | Matthew Cranston Battles | ZX-Spectrum 48K/128K | English |
| 44254 | Matthew Cranston Remixed | ZX-Spectrum 48K/128K | Multi-language: English, Russian |
| 43629 | Max Stone - El Secreto de la Gran Piramide | ZX-Spectrum 48K/128K | Spanish |
| 45008 | Max Stone - MicroHobby Edition | ZX-Spectrum 48K | Multi-language: English, Spanish |
| 30119 | Maxim The Cat | ZX-Spectrum 48K/128K | English |
| 31948 | Mayhem | ZX81 16K | English |
| 35746 | Maze | ZX81 1K | English |
| 40673 | Maze | ZX80 | English |
| 39640 | Maze | ZX81 16K | English |
| 42983 | Maze Castle | ZX-Spectrum 48K/128K | English |