| Sinclair ZX Spectrum cass. |  Jester's Jaunt | 1991 | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Jimmy's Soccer Manager | 1991 | Beyond Belief Soft. |
| Sinclair ZX Spectrum cass. | Jocky Wilson's Compendium of Darts | 1991 | Zeppelin Games |
| Sinclair ZX Spectrum cass. | Johnnie Verso | 1991 | Wazertown Works Spain |
| Sinclair ZX Spectrum cass. | Jonny Quest Model HT 163 | 1991 | Hi-Tec Soft. |
| Sinclair ZX Spectrum cass. | Jump Model SE 1258 | 1991 | Zigurat Soft. Spain |
| Sinclair ZX Spectrum cass. | Kamikaze Model 2421 | 1991 | Codemasters Soft. Co., Ltd., The 015026 |
| Sinclair ZX Spectrum cass. | Kentucky Racing Model AS 781 | 1991 | Alternative Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Kick Box Vigilante | 1991 | Zeppelin Games |
| Sinclair ZX Spectrum cass. | King | 1991 | Psychaedelic Hedgehog Soft. |
| Sinclair ZX Spectrum cass. | Kobyashi Ag'Kwo | 1991 | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Kong's Revenge Model SE 1227 | 1991 | Zigurat Soft. Spain |
| Sinclair ZX Spectrum cass. | Krtek a Auticko | 1991 | Proxima Soft. Czech Republic |
| Sinclair ZX Spectrum cass. | La Aventura Del Dragon | 1991 | Pepsi Soft. Spain |
| Sinclair ZX Spectrum cass. | La Estacion | 1991 | Imperator Spain |
| Sinclair ZX Spectrum cass. | La Maldicion de Aros | 1991 | Istari Design |
| Sinclair ZX Spectrum cass. |  Last Duel Model 548400 P | 1991 | Kixx 013442 |
| Sinclair ZX Spectrum cass. | League Football Model LF | 1991 | Cult |
| Sinclair ZX Spectrum cass. | LED Storm Model 551462 | 1991 | Kixx 013442 |
| Sinclair ZX Spectrum cass. | Lemmings | 1991 | Psygnosis, Ltd. |
| Sinclair ZX Spectrum cass. |  Lemmings demo | 1991 | Psygnosis, Ltd. |
| Sinclair ZX Spectrum cass. | Locodriver 14 | 1991 | Greenup, Ashley |
| Sinclair ZX Spectrum cass. | Logic Model 009 | 1991 | Ultrasoft Slovakia |
| Sinclair ZX Spectrum cass. | Lone Wolf - The Mirror of Death | 1991 | ASL Audiogenic Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Loopz | 1991 | ASL Audiogenic Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Lop Ears | 1991 | Players Soft. |
| Sinclair ZX Spectrum cass. | Lords of Chaos - Expansion Kit 1 | 1991 | Blade Soft. |
| Sinclair ZX Spectrum cass. | Los Pitufos | 1991 | Pepsi Soft. Spain |
| Sinclair ZX Spectrum cass. | Manchester United Europe | 1991 | Krisalis Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Manic Badger | 1991 | Psychaedelic Hedgehog Soft. |
| Sinclair ZX Spectrum cass. | Master Mix | 1991 | US Gold, Ltd. Birmingham, England 13442 |
| Sinclair ZX Spectrum cass. | MAX | 1991 | US Gold, Ltd. Birmingham, England 13442 |
| Sinclair ZX Spectrum cass. | Mega-Hot | 1991 | Codemasters Soft. Co., Ltd., The 015026 |
| Sinclair ZX Spectrum cass. | Megaphoenix Model SPE 910002 | 1991 | Dinamic Soft. Madrid, Spain |
| Sinclair ZX Spectrum cass. | Miami Chase Model 2500 | 1991 | Codemasters Soft. Co., Ltd., The 015026 |
| Sinclair ZX Spectrum cass. | Miami Cobra GT | 1991 | Players Soft. |
| Sinclair ZX Spectrum cass. | Microfair Madness 128k ver. | 1991 | Delbert the Hamster Soft. |
| Sinclair ZX Spectrum cass. | Microfair Madness 48k ver. | 1991 | Delbert the Hamster Soft. |
| Sinclair ZX Spectrum cass. | MicroHobby issue 206: Tape 33 | 1991 | Hobby Press Madrid, Spain |
| Sinclair ZX Spectrum cass. | MicroHobby issue 207: Tape 34 | 1991 | Hobby Press Madrid, Spain |
