| 1206 | Cyclone | ZX-Spectrum 48K | English |
| 38288 | Cyclone Mod | ZX-Spectrum 48K | English |
| 27378 | Cyferki | ZX-Spectrum 48K | Polish |
| 25180 | Cyklotron | ZX-Spectrum 48K | Polish |
| 1210 | Cylu | ZX-Spectrum 48K | English |
| 23649 | Cypher | ZX-Spectrum 48K | English |
| 1212 | Cyrox | ZX-Spectrum 48K | English |
| 1215 | Cytologie | ZX-Spectrum 48K | German |
| 21536 | Czarny Poniedzialek | ZX-Spectrum 48K | Polish |
| 32241 | Czarny sport | ZX-Spectrum 48K | Polish |
| 25186 | Czas Relatywistyczny | ZX-Spectrum 48K | Polish |
| 28144 | Czasowniki Nieregularne cz. 1 | ZX-Spectrum 48K | Polish |
| 28115 | Czestosciomierz | ZX-Spectrum 48K | Polish |
| 28124 | Cztery Dzialania | ZX-Spectrum 48K | Polish |
| 24895 | Czytaj i Pisz po Angielsku | ZX-Spectrum 48K | Polish |
| 38469 | Cálculo de Cadernetas | ZX-Spectrum 48K | Portuguese |
| 38470 | Cálculo de Desconto de Letras | ZX-Spectrum 48K | Portuguese |
| 42053 | Cálculo de Esforços e Deslocamentos | ZX-Spectrum 48K | Portuguese |
| 38578 | Cálculo de Estruturas | ZX-Spectrum 48K | Portuguese |
| 38471 | Cálculo de Estruturas Cilíndricas | ZX-Spectrum 48K | Portuguese |