| 40714 | Keyboard Changes | ZX80 | English |
| 40639 | Keyboard Routines | ZX80 | English |
| 40657 | Keyboard Scanning | ZX80 | English |
| 41213 | Klingon Capture | ZX80 | English |
| 33424 | Kong | ZX80 | - |
| 2000216 | Learning BASIC with Your Sinclair ZX80 | ZX80 | English |
| 40626 | Life | ZX80 | English |
| 35627 | Long or Short | ZX80 | English |
| 41521 | Magic Square | ZX80 | English |
| 40628 | Making Music | ZX80 | English |
| 2000670 | Making the Most of Your ZX80 | ZX80 | English |
| 41511 | Mars Landing | ZX80 | English |
| 40632 | Mastermind | ZX80 | English |
| 40641 | Mastermind | ZX80 | English |
| 40806 | Mastermind '80 | ZX80 | English |
| 40673 | Maze | ZX80 | English |
| 33428 | Mazogs | ZX80 | - |
| 35646 | Mega Mastermind | ZX80 | English |
| 40622 | Memory Display | ZX80 | English |
| 40631 | Memory Lister | ZX80 | English |