| 29494 | Cedric the Clown | ZX81 16K | English |
| 31923 | Celebration | ZX81 16K | English |
| 29495 | Centipede | ZX81 16K | English |
| 28753 | Centipede | ZX81 16K | English |
| 32007 | Centipede - Chroma Extension | ZX81 16K | English |
| 31561 | Champions! | ZX81 16K | - |
| 40586 | Championship Golf | ZX81 16K | English |
| 40865 | Channel Crossing | ZX81 16K | English |
| 41209 | Character Definer | ZX81 16K | English |
| 40002 | Character Set | ZX81 16K | English |
| 28983 | Character Sets Design Program | ZX81 16K | English |
| 40773 | Character Table Printer | ZX81 16K | English |
| 41531 | Characters | ZX81 16K | English |
| 40910 | Charles' Law | ZX81 16K | English |
| 40023 | Chas and I | ZX81 16K | English |
| 45373 | Chatbox | ZX81 16K | English |
| 41365 | Checka Puzzle | ZX81 16K | English |
| 28756 | Checkmate | ZX81 16K | Dutch |
| 41592 | Chemistry | ZX81 16K | English |
| 39631 | Chemistry | ZX81 16K | English |