| Sinclair ZX Spectrum cass. |  ITD BBB - Skidam Te Pogledom: Grand Prix | 198? | CBS Columbia Broadcasting System |
| Sinclair ZX Spectrum cass. | Jack and the Beanstalk | 198? | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Jack the Ripper | 198? | GI Games |
| Sinclair ZX Spectrum cass. | Jack the Ripper | 198? | Zenobi Soft. |
| Sinclair ZX Spectrum cass. |  Jackal | 198? | Serma Madrid, Spain |
| Sinclair ZX Spectrum cass. |  Jasper | 198? | 2.99 Classics |
| Sinclair ZX Spectrum cass. | Jasper | 198? | Dixons |
| Sinclair ZX Spectrum cass. | Jasper | 198? | Zeppelin Games |
| Sinclair ZX Spectrum cass. | Jaws Model AS787 | 198? | Alternative Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Jawz | 198? | Profisoft Germany |
| Sinclair ZX Spectrum cass. | Jawz | 198? | PRISM Micro-informatique S.A. France |
| Sinclair ZX Spectrum cass. | Jawz Model dk013 | 198? | DK Tronics |
| Sinclair ZX Spectrum cass. | Jester Quest | 198? | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Jet Set Willy | 198? | Ventamatic Spain |
| Sinclair ZX Spectrum cass. | Jet Set Willy 2 Model RAS 037 | 198? | Ricochet Mastertronic Group UK |
| Sinclair ZX Spectrum cass. | Jetpac Model RS 009 | 198? | Ricochet Mastertronic Group UK |
| Sinclair ZX Spectrum cass. | Jock & The Time Rings | 198? | Zafiro Soft. Div. Spain |
| Sinclair ZX Spectrum cass. | Jogger | 198? | Riko Data Sweden |
| Sinclair ZX Spectrum cass. | Jonah Barrington's Squash | 198? | Zafi Chip |
| Sinclair ZX Spectrum cass. | Junior Arithmetic | 198? | ADI Accord Data International |
| Sinclair ZX Spectrum cass. | Karnov | 198? | Proein Soft Line Spain |
| Sinclair ZX Spectrum cass. | Kat Trap | 198? | Bug-Byte London, England |
| Sinclair ZX Spectrum cass. | Kendo Warrior | 198? | MCM Soft. Spain |
| Sinclair ZX Spectrum cass. | Kenny Dalglish Soccer Manager | 198? | Zeppelin Games |
| Sinclair ZX Spectrum cass. | Kentilla Model IS 0104 | 198? | Mastertronic, Ltd. UK 012967 |
| Sinclair ZX Spectrum cass. | KGB Super Spy | 198? | Erbe Soft. Spain |
| Sinclair ZX Spectrum cass. | Kick Off | 198? | System 4 de Espana, S.A. Spain |
| Sinclair ZX Spectrum cass. | Kikstart 2 | 198? | Dro Soft. Madrid, Spain |
| Sinclair ZX Spectrum cass. | Killer Kong | 198? | PRISM Micro-informatique S.A. France |
| Sinclair ZX Spectrum cass. | Klax | 198? | Erbe Soft. Spain |
| Sinclair ZX Spectrum cass. | Knight Fall | 198? | System 4 de Espana, S.A. Spain |
| Sinclair ZX Spectrum cass. | Knight Life | 198? | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Knight Lore Model RS 010 | 198? | Ricochet Mastertronic Group UK |
| Sinclair ZX Spectrum cass. | Knight Rider | 198? | Erbe Soft. Spain |
| Sinclair ZX Spectrum cass. | Knightmare | 198? | Proein Soft Line Spain |
| Sinclair ZX Spectrum cass. | Knockout | 198? | Americana Soft. |
| Sinclair ZX Spectrum cass. | Knuckle Busters | 198? | Dro Soft. Madrid, Spain |
| Sinclair ZX Spectrum cass. | Knuckle Busters Model RS 015 | 198? | Ricochet Mastertronic Group UK |
| Sinclair ZX Spectrum cass. | Kobyashi Naru | 198? | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | Kokotoni Wilf Model 020170 | 198? | Encore 012189 |
