| Sinclair ZX Spectrum cass. |  Lunar Rescue | 1983 | Lyversoft |
| Sinclair ZX Spectrum cass. | Mad Martha | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Mad Martha II | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Mage Cage | 1983 | Micro Adventurer |
| Sinclair ZX Spectrum cass. | Magic Castle | 1983 | Gilsoft International, Ltd. |
| Sinclair ZX Spectrum cass. | Magic Meanies Model XXX 1010 | 1983 | CDS Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Magic Mountain Model PA 002 | 1983 | Phipps Associates |
| Sinclair ZX Spectrum cass. | Magic Worm | 1983 | Lyndenhurst |
| Sinclair ZX Spectrum cass. | Manage | 1983 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Manic Miner Model BBS00105 | 1983 | Bug-Byte London, England |
| Sinclair ZX Spectrum cass. | Margana | 1983 | Longman Soft. |
| Sinclair ZX Spectrum cass. | Master Code | 1983 | Bamby Soft. |
| Sinclair ZX Spectrum cass. | Masterchess | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Masterchess II | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Maths Test | 1983 | ADI Accord Data International |
| Sinclair ZX Spectrum cass. | Maze Chase | 1983 | Hewson Consultants, Ltd. England 012635 |
| Sinclair ZX Spectrum cass. | Maze Death Race Model 001 | 1983 | PSS Personal Soft. Services 012484 |
| Sinclair ZX Spectrum cass. | Mazeman | 1983 | Abersoft |
| Sinclair ZX Spectrum cass. | Maziacs Model DK 018 | 1983 | DK Tronics |
| Sinclair ZX Spectrum cass. | McKensie | 1983 | Software Projects, Ltd. |
| Sinclair ZX Spectrum cass. | Medieval Adventure | 1983 | ASP Soft. |
| Sinclair ZX Spectrum cass. | Megapede Model SOF/SPG 003 | 1983 | Softek International, Ltd. |
| Sinclair ZX Spectrum cass. |  Menace Model 000105 | 1983 | Firebird Soft. UK 012439 |
| Sinclair ZX Spectrum cass. | Menace! | 1983 | Fashionsoft |
| Sinclair ZX Spectrum cass. | Meteor | 1983 | Hofacker Verlag |
| Sinclair ZX Spectrum cass. | Metrics Quiz | 1983 | Chalksoft Ltd. |
| Sinclair ZX Spectrum cass. | Micro Mouse Goes De-bugging | 1983 | MC Lothlorien |
| Sinclair ZX Spectrum cass. | Microbot Mode SPG 6 | 1983 | Softek International, Ltd. |
| Sinclair ZX Spectrum cass. | Microbug | 1983 | Wheaton Soft., Arnold |
| Sinclair ZX Spectrum cass. | Microgold Adventure | 1983 | Micro Gold |
| Sinclair ZX Spectrum cass. | Microsoftware Magazine No. 1 | 1983 | Infinite Soft. |
| Sinclair ZX Spectrum cass. | Microsoftware Magazine No. 2 | 1983 | Infinite Soft. |
| Sinclair ZX Spectrum cass. | Microsoftware Magazine No. 3 | 1983 | Infinite Soft. |
| Sinclair ZX Spectrum cass. | Microsoftware Magazine No. 4 | 1983 | Infinite Soft. |
| Sinclair ZX Spectrum cass. | Millikilla | 1983 | Oasis Soft. England |
| Sinclair ZX Spectrum cass. | Millipede | 1983 | Softek International, Ltd. |
| Sinclair ZX Spectrum cass. | Mined-Out Model QSP 0008 | 1983 | Quicksilva |
| Sinclair ZX Spectrum cass. | Minenfeld | 1983 | Hofacker Verlag |
| Sinclair ZX Spectrum cass. | Mini Sector | 1983 | Hofacker Verlag |
| Sinclair ZX Spectrum cass. | Missile Defence | 1983 | Anirog Soft., Ltd. |
