| 32035 | Mazogs - Chroma Extension | ZX81 16K | English |
| 40098 | Measure | ZX81 16K | English |
| 29082 | Meditor | ZX81 16K | German |
| 29081 | Meditor Demo | ZX81 16K | German |
| 29080 | Meditor Kalkulation | ZX81 16K | - |
| 35667 | Mega Christmas Cracker Simulator | ZX81 16K | English |
| 31721 | Megamind | ZX81 16K | - |
| 40764 | Megatron Run | ZX81 16K | English |
| 28991 | Meisjes-Internaat | ZX81 16K | Dutch |
| 40464 | Memory | ZX81 16K | English |
| 35576 | Memory Game | ZX81 16K | English |
| 43594 | Memory Magic | ZX81 16K | English |
| 41093 | Memory Man | ZX81 16K | English |
| 40054 | Memory Miser | ZX81 16K | English |
| 40931 | Memory Program | ZX81 16K | English |
| 40807 | Memory Remaining | ZX81 16K | English |
| 37936 | Menace Sur La Cite | ZX81 16K | French |
| 29087 | Mens Erger Je Niet | ZX81 16K | Dutch |
| 32036 | Mensch Ärgere Dich Nicht | ZX81 16K | German |
| 32085 | Mercador dos Sete Mares | ZX81 16K | Portuguese |