| 19523 | Castle of Doom | ZX-Spectrum 48K | English |
| 27213 | Castle of Lost Souls | ZX-Spectrum 48K | English |
| 6070 | Castle of the Skull Lord | ZX-Spectrum 48K | English |
| 13178 | Castlemaze Adventure | ZX-Spectrum 48K | English |
| 32336 | Cattus Atrox - An Interactive Fiction Story (ZxZvm) | ZX-Spectrum 128 +3 | English |
| 43530 | Cave Adventure | ZX81 2K | English |
| 6073 | Cavern Chaos | ZX-Spectrum 48K | English |
| 35912 | Caverns of Jupiter | ZX-Spectrum 48K | English |
| 10736 | Cell of the Ridges | ZX-Spectrum 48K | English |
| 44244 | Cells | ZX-Spectrum 48K | English |
| 6800 | Celtic Carnage | ZX-Spectrum 48K | English |
| 39534 | Central Nuclear Atom | ZX-Spectrum 48K | Spanish |
| 21204 | Chain of Koschei | ZX-Spectrum 48K | Russian |
| 32337 | Chicken Under the Window - An Interactive Farce (ZxZvm) | ZX-Spectrum 128 +3 | English |
| 35841 | Christmas at the Microfair | ZX-Spectrum 48K | - |
| 32338 | Christminster - An Interactive Conspiracy (ZxZvm) | ZX-Spectrum 128 +3 | English |
| 6085 | Civil Service | ZX-Spectrum 48K | English |
| 10743 | Civil Service II | ZX-Spectrum 48K | English |
| 9608 | Clash of the Princes - The Warlock's Way | ZX-Spectrum 48K | English |
| 9609 | Clash of the Princes - The Warrior's Way | ZX-Spectrum 48K | English |