| 41621 | The Sky at Night | ZX81 16K | English |
| 31805 | The Stamp Collector | ZX81 16K | - |
| 39792 | The Steps | ZX81 16K | English |
| 31816 | The Stock Market Calculator | ZX81 16K | - |
| 31819 | The Stock Option Analyzer | ZX81 16K | - |
| 29359 | The Sword of Peace | ZX81 16K | English |
| 29385 | The Time Bandits | ZX81 16K | English |
| 31851 | The Trident | ZX81 16K | - |
| 40490 | The Unicorn | ZX81 16K | English |
| 34777 | The Valley of Adventure | ZX81 16K | English |
| 40118 | The World | ZX81 16K | English |
| 31887 | The ZX81 Pocket Book | ZX81 16K | - |
| 29381 | Things | ZX81 16K | English |
| 39874 | Think of a Number | ZX81 16K | English |
| 35643 | Think of a Word | ZX81 16K | English |
| 29663 | Thirty Ones | ZX81 16K | English |
| 38757 | This Old House | ZX81 16K | English |
| 41042 | Three Towers | ZX81 16K | English |
| 31844 | Thro' The Wall | ZX81 16K | English |
| 31978 | Thro' The Wall | ZX81 16K | English |