| 24353 | Killer DOS | ZX-Spectrum 48K | English |
| 33376 | Killer Ducks from Outer Space | ZX-Spectrum 48K | English |
| 21154 | Killer Special Edition | ZX-Spectrum 48K | English |
| 42642 | Killer Squares | ZX-Spectrum 48K | English |
| 26702 | Killer-Shark Castle | ZX-Spectrum 16K | English |
| 17803 | Kilopede | ZX-Spectrum 16K | English |
| 2698 | Kinetik | ZX-Spectrum 48K | English |
| 44459 | King Kong - Parte I: El Muro | ZX-Spectrum 128K | Spanish |
| 2858 | King Leonard | ZX-Spectrum 48K | Spanish |
| 24943 | King of Pong | ZX-Spectrum 48K | - |
| 26703 | Kingfisher | ZX-Spectrum 16K | English |
| 44012 | Kingfisher | ZX-Spectrum 16K/48K | English |
| 44013 | Kitchen Carousel | ZX-Spectrum 48K | English |
| 24277 | Kitchen Chaos | ZX-Spectrum 48K | English |
| 12897 | Klademiner | ZX-Spectrum 128K | Russian |
| 41213 | Klingon Capture | ZX80 | English |
| 40046 | Klingon Defence | ZX-Spectrum 48K | English |
| 35727 | Klingons | ZX81 1K | English |
| 40947 | Klong | ZX81 16K | English |
| 38622 | Klonix | ZX-Spectrum 48K | Spanish |