| Sinclair ZX Spectrum cass. |  Missing Words | 1983 | Stell Soft. |
| Sinclair ZX Spectrum cass. | Mission Impossible | 1983 | Silversoft |
| Sinclair ZX Spectrum cass. | Mission Mars | 1983 | Kempsoft |
| Sinclair ZX Spectrum cass. | Mission Omega Model D6007 | 1983 | Pulsonic |
| Sinclair ZX Spectrum cass. | Molar Maul | 1983 | Microbyte, S.A. |
| Sinclair ZX Spectrum cass. | Molar Maul Model MM | 1983 | Imagine Soft. Ocean Group 13156 |
| Sinclair ZX Spectrum cass. | Money | 1983 | Stell Soft. |
| Sinclair ZX Spectrum cass. | Monkey Biznes Model ACS 085 | 1983 | Artic Computing, Ltd. |
| Sinclair ZX Spectrum cass. | Monster Muncher | 1983 | Spectrum Games |
| Sinclair ZX Spectrum cass. | Monsters in Hell Model SOF/SPG002 | 1983 | Softek International, Ltd. |
| Sinclair ZX Spectrum cass. | Monte Carlo | 1983 | Micromega |
| Sinclair ZX Spectrum cass. | Moon Buggy | 1983 | Anirog Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Moon Buggy Model VS-04-08 | 1983 | Visions Soft. Factory |
| Sinclair ZX Spectrum cass. | Moonlander | 1983 | Orion Soft. |
| Sinclair ZX Spectrum cass. | Moonsweeper | 1983 | Cheetahsoft |
| Sinclair ZX Spectrum cass. | Moria | 1983 | Severn Soft. |
| Sinclair ZX Spectrum cass. | Morris Meets the Bikers | 1983 | Automata U.K., Ltd. |
| Sinclair ZX Spectrum cass. |  Morris meets the Bikers | 1983 | ZX Data Denmark |
| Sinclair ZX Spectrum cass. | Mountains of Ket Model N002 | 1983 | Incentive Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Mouse | 1983 | WB Soft. |
| Sinclair ZX Spectrum cass. | Munch Man Model DK022 | 1983 | DK Tronics |
| Sinclair ZX Spectrum cass. | Munch-Man | 1983 | Astro Soft. |
| Sinclair ZX Spectrum cass. | Munchman | 1983 | Contrast Soft. |
| Sinclair ZX Spectrum cass. | Murder at the Manor | 1983 | Gemtime |
| Sinclair ZX Spectrum cass. |  Murder at the Manor | 1983 | Omega Soft. |
| Sinclair ZX Spectrum cass. | Murder! Model RSS 322 | 1983 | Rabbit Soft. |
| Sinclair ZX Spectrum cass. | My Name is Uncle Groucho...You Win a Fat Cigar | 1983 | Automata U.K., Ltd. |
| Sinclair ZX Spectrum cass. | My Word | 1983 | Papillon Soft. |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #11: Waxworks | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #1: The Golden Baton | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #2: Arrow of Death Part 1 | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #3: Arrow of Death Part 2 | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #4: Escape from Pulsar 7 | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #5: Feasibility Experiment | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #6: The Time Machine | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #7: Circus | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #8: The Wizard of Akyrz | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Mysterious Adventures #9: Perseus & Andromeda | 1983 | Digital Fantasia |
| Sinclair ZX Spectrum cass. | Naanas | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Never trust a Blond | 1983 | Elfin Soft., Ltd. |
