| 42379 | The Color Challenge's Jailbreak! | ZX-Spectrum 48K | English |
| 10553 | The Colossal Cave | ZX-Spectrum 48K | English |
| 2000069 | The Colour Coded Guide to Microcomputers | - | English |
| 6100 | The Colour of Magic | ZX-Spectrum 48K | English |
| 1037 | The Comet Game | ZX-Spectrum 48K | English |
| 2000071 | The Commercial Games Programmer's Guide | - | English |
| 2000072 | The Companion to the Sinclair ZX Microdrive and Interfaces | - | English |
| 25376 | The Compass Collection | ZX-Spectrum 48K | English |
| 19951 | The Complete BASIC Programmer | ZX-Spectrum 16K | English |
| 2000468 | The Complete FORTH | - | English |
| 20907 | The Complete Games Centre | ZX-Spectrum 48K | English |
| 9056 | The Complete Guide to Medicine | ZX-Spectrum 48K | English |
| 2001671 | The Complete Guide to SAM BASIC | SAM Coupé | English |
| 11230 | The Complete Home Entertainment Centre | ZX-Spectrum 48K | English |
| 16895 | The Complete Home Entertainment Centre - 10 Great Games | ZX-Spectrum 48K | English |
| 15772 | The Complete Machine Code Programmer | ZX-Spectrum 16K | English |
| 8031 | The Complete Machine Code Tutor | ZX-Spectrum 48K | English |
| 2000073 | The Complete Programmer | - | English |
| 2000595 | The Complete Sinclair Database | - | English |
| 2000664 | The Complete Sinclair ZX81 Basic Course | - | English |