| 19352 | Masterchem | ZX-Spectrum 16K | English |
| 3057 | Masterchess | ZX-Spectrum 48K | English |
| 9934 | Masterclass | ZX-Spectrum 48K | English |
| 8393 | Mastercopy | ZX-Spectrum 48K | English |
| 8392 | Mastercopy128 | ZX-Spectrum 48K/128K | English |
| 4000216 | Masterfile | Timex Tx2068 | English |
| 12379 | Masterfile +3 | ZX-Spectrum 128 +3 | English |
| 20340 | Masterfile-16 | ZX-Spectrum 16K | English |
| 2001467 | Mastering CP/M | - | English |
| 29720 | Mastering Machine Code | ZX-Spectrum 48K | English |
| 2000237 | Mastering Machine Code on Your ZX Spectrum | - | English |
| 2000236 | Mastering Machine Code on Your ZX81 or ZX80 | - | English |
| 2000830 | Mastering Your Timex Sinclair 1000 Personal Computer | - | English |
| 2000480 | Mastering the ZX Spectrum | - | English |
| 44310 | Mastermaze | ZX-Spectrum 48K | English |
| 42741 | Mastermind | ZX81 16K | English |
| 44719 | Mastermind | ZX-Spectrum 16K/48K | English |
| 44837 | Mastermind | ZX-Spectrum 16K | English |
| 42471 | Mastermind | ZX-Spectrum 16K | English |
| 40632 | Mastermind | ZX80 | English |