| ID | Title | Machine | Language |
|---|---|---|---|
| 37330 | Cursed Catacombs | ZX81 16K | English |
| 40923 | Curve Fit | ZX81 16K | English |
| 40984 | Customs Officer | ZX81 16K | English |
| 41821 | Cyborg Wars | ZX81 16K | - |
| 39671 | Cypher | ZX81 16K | English |
| 41433 | Cypher Breaker | ZX81 16K | English |
| 31589 | D Coder | ZX81 16K | - |
| 39938 | DEF FN Simulation | ZX81 16K | English |
| 41420 | DEFMAG | ZX81 16K | English |
| 41762 | DELETE GGMI | ZX81 16K | Portuguese |
| 28811 | DEMO | ZX81 16K | - |
| 41763 | DEPURA ERROS | ZX81 16K | Portuguese |
| 41764 | DEPURADOR FHL | ZX81 16K | Portuguese |
| 41765 | DISASSEMBLER | ZX81 16K | Portuguese |
| 37686 | DON'T PANIC | ZX81 16K | English |
| 28791 | Dallas | ZX81 16K | English |
| 40970 | Dam Builder | ZX81 16K | English |
| 28792 | Dammen | ZX81 16K | Dutch |
| 28794 | Damnation Alley | ZX81 16K | English |
| 28796 | Damper | ZX81 16K | English |