| 2596 | JetSet Willy III | ZX-Spectrum 48K | English |
| 35847 | Jetpac 2 | ZX-Spectrum 48K | - |
| 9864 | Jetset-Freddy | ZX-Spectrum 48K | German |
| 22365 | Johnny Chispas | ZX-Spectrum 48K | Spanish |
| 43748 | Johnny Danger y el Talismán de Fuego | ZX-Spectrum 48K/128K | Spanish |
| 2605 | Join the Jet-Set | ZX-Spectrum 48K | English |
| 11818 | Jolly Roger | ZX-Spectrum 48K | English |
| 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 |