| Sinclair ZX Spectrum cass. |  Keycode | 1983 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Killer Kong | 1983 | Blaby Computer Games |
| Sinclair ZX Spectrum cass. | King Arthur | 1983 | East Midlands Soft. |
| Sinclair ZX Spectrum cass. | Knockout | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Knot in 3D Model NGS3 | 1983 | New Generation Soft. |
| Sinclair ZX Spectrum cass. | Kong | 1983 | Anirog Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Kong | 1983 | Ocean Soft., Ltd. 13156 |
| Sinclair ZX Spectrum cass. | Kosmic Pirate | 1983 | Blaby Computer Games |
| Sinclair ZX Spectrum cass. | Krago Castle | 1983 | Assassin Soft. |
| Sinclair ZX Spectrum cass. | Krazy Kong | 1983 | PSS Personal Soft. Services 012484 |
| Sinclair ZX Spectrum cass. | Kwik-Kalk | 1983 | Methodia Design Norway |
| Sinclair ZX Spectrum cass. | La Mina | 1983 | Ventamatic Spain |
| Sinclair ZX Spectrum cass. | La Pulga | 1983 | Investronica Spain |
| Sinclair ZX Spectrum cass. | Labyrinth | 1983 | Axis Soft. |
| Sinclair ZX Spectrum cass. | Lancer Lords Model RSS 319 | 1983 | Rabbit Soft. |
| Sinclair ZX Spectrum cass. | Land of Sagan | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Las Vegas | 1983 | Temptation Soft. |
| Sinclair ZX Spectrum cass. | Las Vegas Lady Model MOG3003 | 1983 | Mogul Communications, Ltd. |
| Sinclair ZX Spectrum cass. | Laser Snaker | 1983 | Poppy Soft |
| Sinclair ZX Spectrum cass. | Laser Zone Model QSP 0065 | 1983 | Quicksilva |
| Sinclair ZX Spectrum cass. | Laserstraal | 1983 | Soft & Easy |
| Sinclair ZX Spectrum cass. | Laserwarp | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Last Sunset for Lattica Model SUN | 1983 | Arcade Soft. |
| Sinclair ZX Spectrum cass. | Lazatron + Mazechase | 1983 | Contrast Soft. |
| Sinclair ZX Spectrum cass. | Leapfrog Model 3 | 1983 | CDS Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Leopard Lord | 1983 | Kayde Soft. |
| Sinclair ZX Spectrum cass. | Light Cycle Model 009 | 1983 | PSS Personal Soft. Services 012484 |
| Sinclair ZX Spectrum cass. | Lindrick | 1983 | Hornby Soft. |
| Sinclair ZX Spectrum cass. | Loch Ness Monster | 1983 | Hi-Tech Microsoft |
| Sinclair ZX Spectrum cass. | Loco | 1983 | Campbell Systems |
| Sinclair ZX Spectrum cass. | Lojix Model VGC 1006 | 1983 | Virgin Games, Ltd. UK 013715 |
| Sinclair ZX Spectrum cass. | Loony Zoo | 1983 | Phipps Associates |
| Sinclair ZX Spectrum cass. | Lord Harry | 1983 | Lotus-Soft |
| Sinclair ZX Spectrum cass. | Lords of Time | 1983 | Level 9 Computing |
| Sinclair ZX Spectrum cass. | Lost over Bermuda | 1983 | Elfin Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Lost Model VGC 1010 | 1983 | Virgin Games, Ltd. UK 013715 |
| Sinclair ZX Spectrum cass. | Luna Crabs Model QTC 721 | 1983 | Micromega |
| Sinclair ZX Spectrum cass. | Lunar Jetman Model 481005 | 1983 | Ultimate Play The Game |
| Sinclair ZX Spectrum cass. | Lunar Letters | 1983 | Longman Soft. |
| Sinclair ZX Spectrum cass. | Lunar Rescue | 1983 | CRL Group PLC London, England |
