| 36331 | Cavaquinho | ZX-Spectrum 48K | Portuguese |
| 31991 | Cavernas de Marte | ZX81 16K | Portuguese |
| 38193 | Centauro #1 | ZX-Spectrum 48K | Portuguese |
| 42107 | Chegar, Apostar e Vencer | ZX-Spectrum 48K | Portuguese |
| 44431 | Chiclete | ZX-Spectrum 48K | Portuguese |
| 38885 | Chikki Static | ZX-Spectrum 48K | Portuguese |
| 42108 | Cinematica | ZX-Spectrum 48K | Portuguese |
| 42265 | Cinemator | ZX-Spectrum 48K | Portuguese |
| 38522 | Circuit Breaker | ZX-Spectrum 48K | Portuguese |
| 36592 | Circuitos Lógicos | ZX-Spectrum 48K | Portuguese |
| 2001378 | Circuitos Sinclair "Inclui TK90X" | - | Portuguese |
| 2001379 | Circuitos de Micros | - | Portuguese |
| 32009 | Clock | ZX81 16K | Portuguese |
| 38886 | Cloner | ZX-Spectrum 48K | Portuguese |
| 38685 | Coleccionador de Selos | ZX81 16K | Portuguese |
| 2001473 | Coleção de Programas Vol. I | - | Portuguese |
| 2001115 | Coleção de Programas Vol. II | - | Portuguese |
| 2001474 | Coleção de Programas Vol. III | - | Portuguese |
| 36589 | Colunas | ZX-Spectrum 48K | Portuguese |
| 32079 | Combate | ZX81 16K | Portuguese |