| 35657 | Sinclair Blind Flight Simulator 2009 | ZX81 16K | English |
| 41585 | Sinclair Snooker | ZX81 16K | English |
| 29291 | Sinclair Snooker | ZX81 16K | English |
| 31790 | Sinclair User Club Volume 8 | ZX81 16K | - |
| 32055 | Sinus | ZX81 16K | English |
| 28984 | Sinus | ZX81 16K | - |
| 28564 | Sistemas de Numeración | ZX81 16K | Spanish |
| 29075 | Sketch | ZX81 16K | English |
| 40482 | Sketcher | ZX81 16K | English |
| 40125 | Sketchpad | ZX81 16K | English |
| 40696 | Sketchpad | ZX81 16K | English |
| 39982 | Sketchpad | ZX81 16K | English |
| 39629 | Skier | ZX81 16K | English |
| 41620 | Slalom | ZX81 16K | English |
| 41813 | Slalom | ZX81 16K | - |
| 41411 | Sleeping Beauty | ZX81 16K | English |
| 39972 | Slide-Along | ZX81 16K | English |
| 40539 | Slithery Jim | ZX81 16K | English |
| 39755 | Slot | ZX81 16K | English |
| 29286 | Slot Machine | ZX81 16K | English |