| 28991 | Meisjes-Internaat | ZX81 16K | Dutch |
| 16205 | Mercado | ZX-Spectrum 48K | Spanish |
| 29088 | Merchant of Venus | ZX81 16K | English |
| 3179 | Micromaker | ZX-Spectrum 48K | English |
| 26510 | Middle Age | ZX-Spectrum 48K | Italian |
| 3204 | Millionaire | ZX-Spectrum 48K | English |
| 17768 | Millionaire | ZX-Spectrum 16K | English |
| 29096 | Millionaire | ZX81 16K | English |
| 3210 | Minder | ZX-Spectrum 48K | English |
| 31062 | Mini Game Compo Simulator | ZX-Spectrum 48K | English |
| 35839 | Mini Stocks 128K | ZX-Spectrum 128K | English |
| 28660 | Mission Apollo | ZX81 16K | Multi-language: Dutch, English |
| 35208 | Motte and Bailey Castle | ZX-Spectrum 48K/128K | English |
| 6715 | Mugsy | ZX-Spectrum 48K | English |
| 29118 | Mugsy | ZX81 16K | English |
| 6716 | Mugsy's Revenge | ZX-Spectrum 48K | English |
| 26371 | Murder | ZX-Spectrum 48K | Italian |
| 29123 | Murgatroyds Revenge | ZX81 16K | English |
| 34809 | Muso | ZX-Spectrum 48K | English |
| 9995 | Nationale Smo Ondernemingspel | ZX-Spectrum 48K | Dutch |