| 2640 | Jon the Jany | ZX-Spectrum 48K | English |
| 38797 | Jonathan - Trick or Treat | ZX-Spectrum 48K | English |
| 2643 | Jonny Quest | ZX-Spectrum 48K/128K | English |
| 30332 | Journey to the Centre of the Nose | ZX-Spectrum 48K | English |
| 37758 | Journey to the Unknown | ZX-Spectrum 48K | English |
| 27446 | Julieta Noseque | ZX-Spectrum 48K | English |
| 30325 | Julifrustris in the City | ZX-Spectrum 48K | English |
| 43850 | Jump | ZX-Spectrum 48K | German |
| 35680 | Jumpin' Jupiter | ZX-Spectrum 48K | English |
| 43384 | Jumpin' Jupiter Prelude | ZX-Spectrum 48K | English |
| 2658 | Jumping Jack | ZX-Spectrum 16K | English |
| 36177 | Jungle Eddi | Sinclair QL | - |
| 2660 | Jungle Fever | ZX-Spectrum 16K | English |
| 2661 | Jungle Trouble | ZX-Spectrum 16K | - |
| 25671 | Junior Cong | ZX-Spectrum 48K | English |
| 30043 | Justin and The Lost Abbey | ZX-Spectrum 48K | Spanish |
| 38606 | Kenguru | ZX-Spectrum 48K | Slovenian |
| 2693 | Kidnap | ZX-Spectrum 48K | English |
| 20299 | Killa Gorilla | ZX-Spectrum 48K | English |
| 2695 | Killer Knight | ZX-Spectrum 48K | English |