| ID | Title | Machine | Language |
|---|---|---|---|
| 29499 | Colditz | ZX81 16K | English |
| 28768 | Colditz Castle | ZX81 16K | English |
| 38685 | Coleccionador de Selos | ZX81 16K | Portuguese |
| 31568 | Collector's Pack | ZX81 16K | - |
| 31569 | Collector's Recording System | ZX81 16K | - |
| 28769 | Collectors Corner | ZX81 16K | English |
| 31570 | College Cost Analyzer | ZX81 16K | - |
| 35926 | Colossal Adventure | ZX81 16K | English |
| 28770 | Colt | ZX81 16K | Dutch |
| 44626 | Columbia | ZX81 16K | French |
| 41070 | Column Scroll | ZX81 16K | English |
| 28771 | Combat | ZX81 16K | English |
| 28772 | Combat Flight | ZX81 16K | English |
| 32079 | Combate | ZX81 16K | Portuguese |
| 31571 | Community Chest | ZX81 16K | - |
| 39207 | Comp-U-Tax | ZX81 16K | English |
| 31575 | Comp-u-Share | ZX81 16K | - |
| 41613 | Compac | ZX81 16K | English |
| 31572 | Compatibility | ZX81 16K | - |
| 28774 | Compiler | ZX81 16K | - |