| 6507 | Jester Quest | ZX-Spectrum 48K/128K | English |
| 9361 | Jet Bike Simulator | ZX-Spectrum 48K/128K | English |
| 37703 | Jet Pack Neo | ZX-Spectrum 48K/128K | English |
| 43231 | Jet Set Steamboat Willie | ZX-Spectrum 48K/128K | English |
| 2595 | Jet Set Willy II | ZX-Spectrum 48K/128K | English |
| 14591 | Jet Set Willy: The DrUnKeN mAsTeR!!! | ZX-Spectrum 48K/128K | English |
| 2612 | Jet-Story | ZX-Spectrum 48K/128K | English |
| 44153 | JetPac Miner | ZX-Spectrum 48K/128K | English |
| 36139 | Jetpack Jock | ZX-Spectrum 48K/128K | English |
| 11293 | Jewels of Darkness | ZX-Spectrum 48K/128K | English |
| 2620 | Joe Blade | ZX-Spectrum 48K/128K | English |
| 2623 | Joe Blade II | ZX-Spectrum 48K/128K | English |
| 2627 | Joe Blade III | ZX-Spectrum 48K/128K | English |
| 35146 | Joe Blob | ZX-Spectrum 48K/128K | English |
| 43748 | Johnny Danger y el Talismán de Fuego | ZX-Spectrum 48K/128K | Spanish |
| 42644 | Johnny the Ghost | ZX-Spectrum 48K/128K | English |
| 12882 | Jolly Lines | ZX-Spectrum 48K/128K | Russian |
| 2643 | Jonny Quest | ZX-Spectrum 48K/128K | English |
| 30391 | Jubbles | ZX-Spectrum 48K/128K | English |
| 11820 | Judge Dredd | ZX-Spectrum 48K/128K | English |