| Sinclair ZX Spectrum cass. |  Conquering Everest | 1983 | ASP Soft. |
| Sinclair ZX Spectrum cass. |  Cookie | 1983 | Svenska Soft Service |
| Sinclair ZX Spectrum cass. | Cookie | 1983 | Sinclair Research, Ltd. |
| Sinclair ZX Spectrum cass. | Cookie Model 161004 | 1983 | Ultimate Play The Game |
| Sinclair ZX Spectrum cass. | Copper | 1983 | Vectis Soft. |
| Sinclair ZX Spectrum cass. | Corn Cropper | 1983 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Corridors of Genon Model NGS 7 | 1983 | New Generation Soft. |
| Sinclair ZX Spectrum cass. | Cosmic Debris | 1983 | Artic Computing, Ltd. |
| Sinclair ZX Spectrum cass. | Cosmic Debris | 1983 | ZX Data Denmark |
| Sinclair ZX Spectrum cass. | Cosmic Guerilla | 1983 | Crystal Computing |
| Sinclair ZX Spectrum cass. | Cosmic Pirate | 1983 | Blaby Computer Games |
| Sinclair ZX Spectrum cass. | Cosmic Raiders | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Count About | 1983 | Longman Soft. |
| Sinclair ZX Spectrum cass. | Cowboy Shootout | 1983 | Micro Power, Ltd. |
| Sinclair ZX Spectrum cass. | Crash Model MOG 3004 | 1983 | Mogul Communications, Ltd. |
| Sinclair ZX Spectrum cass. | Crawler | 1983 | CRL Group PLC London, England |
| Sinclair ZX Spectrum cass. | Crazy Balloons | 1983 | A&F Soft. |
| Sinclair ZX Spectrum cass. | Crazy Bugs! | 1983 | AWA Soft. |
| Sinclair ZX Spectrum cass. | Crazy Golf | 1983 | Mr. Micro |
| Sinclair ZX Spectrum cass. | Creepy Crawler | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Crevasse + Hotfoot | 1983 | Microsphere Computer Services, Ltd. |
| Sinclair ZX Spectrum cass. | Cricket | 1983 | Owen, T.J. |
| Sinclair ZX Spectrum cass. | Crossword Puzzler | 1983 | National Extension College Trust |
| Sinclair ZX Spectrum cass. | Cruise Attack | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Cruising on Broadway | 1983 | Solarsoft |
| Sinclair ZX Spectrum cass. | Cruising on Broadway | 1983 | Sunshine Books, Ltd. |
| Sinclair ZX Spectrum cass. | Cry Wolf | 1983 | Custom Cables International |
| Sinclair ZX Spectrum cass. | Cuddly Cuburt | 1983 | Interceptor Soft. |
| Sinclair ZX Spectrum cass. | Cyber Zone | 1983 | Crystal Computing |
| Sinclair ZX Spectrum cass. | Cybotron | 1983 | Micromania France |
| Sinclair ZX Spectrum cass. | Cybotron | 1983 | Ventamatic Spain |
| Sinclair ZX Spectrum cass. | Cyrus IS Chess | 1983 | Sinclair Research, Ltd. |
| Sinclair ZX Spectrum cass. | Dallas | 1983 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Dallas | 1983 | VTR Soft. France |
| Sinclair ZX Spectrum cass. | Dam Busters | 1983 | Professional Soft. |
| Sinclair ZX Spectrum cass. | Dark Lore | 1983 | 8th Day Soft. Liverpool, England |
| Sinclair ZX Spectrum cass. | Darts | 1983 | Mr. Chip Soft. |
| Sinclair ZX Spectrum cass. | Day of the Match | 1983 | Video Soft., Inc. |
| Sinclair ZX Spectrum cass. | De-Fusion | 1983 | Lyndenhurst |
| Sinclair ZX Spectrum cass. | Death Cruiser | 1983 | Noble House Soft. |
