| Sinclair ZX Spectrum cass. |  Oligopoly | 1983 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Omega Run | 1983 | CRL Group PLC London, England |
| Sinclair ZX Spectrum cass. | Ometron | 1983 | Software Projects, Ltd. |
| Sinclair ZX Spectrum cass. | One Hundred and Eighty! | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Orion | 1983 | Software Projects, Ltd. |
| Sinclair ZX Spectrum cass. | Ostron Model SOF/SUS002 | 1983 | Softek International, Ltd. |
| Sinclair ZX Spectrum cass. | Othello | 1983 | Ere Informatique Paris, France |
| Sinclair ZX Spectrum cass. | Othello | 1983 | Professional Soft. |
| Sinclair ZX Spectrum cass. | Othello Model 4 | 1983 | CDS Soft., Ltd. |
| Sinclair ZX Spectrum cass. | P.S.E. Games Tape 2 | 1983 | Precision Soft. Engineering |
| Sinclair ZX Spectrum cass. | Paddington And The Disappearing Ink | 1983 | Collins Soft |
| Sinclair ZX Spectrum cass. | Painter | 1983 | A&F Soft. |
| Sinclair ZX Spectrum cass. | Pakacuda Model RSS 304 | 1983 | Rabbit Soft. |
| Sinclair ZX Spectrum cass. | Pandemonia | 1983 | CRL Group PLC London, England |
| Sinclair ZX Spectrum cass. | Panic | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Panic Model 015 | 1983 | PSS Personal Soft. Services 012484 |
| Sinclair ZX Spectrum cass. | Panique | 1983 | Ere Informatique Paris, France |
| Sinclair ZX Spectrum cass. | Paragram | 1983 | Elephant Soft. |
| Sinclair ZX Spectrum cass. | Paras | 1983 | MC Lothlorien |
| Sinclair ZX Spectrum cass. | Paratroopers Model RSS 302 | 1983 | Rabbit Soft. |
| Sinclair ZX Spectrum cass. | Paris Trip | 1983 | Garland Computing |
| Sinclair ZX Spectrum cass. | Pat the Postman | 1983 | Mikro-Gen UK |
| Sinclair ZX Spectrum cass. | Pathfinder | 1983 | Widgit Soft., Ltd. UK |
| Sinclair ZX Spectrum cass. | Pawnchess | 1983 | Contrast Soft. |
| Sinclair ZX Spectrum cass. | Pearl Harbour | 1983 | Sabresoft |
| Sinclair ZX Spectrum cass. | Peloponnesian War | 1983 | MC Lothlorien |
| Sinclair ZX Spectrum cass. | Penetrator | 1983 | Melbourne House UK 015901 |
| Sinclair ZX Spectrum cass. | Penetrator | 1983 | Investronica Spain |
| Sinclair ZX Spectrum cass. | Pengy | 1983 | Micromania France |
| Sinclair ZX Spectrum cass. | Pentominoes | 1983 | Spectre |
| Sinclair ZX Spectrum cass. | Perigos na Selva | 1983 | TMX Portugal, Ltda. |
| Sinclair ZX Spectrum cass. | Phantasia Model RSS 317 | 1983 | Rabbit Soft. |
| Sinclair ZX Spectrum cass. | Phasorchase | 1983 | Soft Hits |
| Sinclair ZX Spectrum cass. | Pheenix | 1983 | Megadodo Soft. |
| Sinclair ZX Spectrum cass. | Physics 1 | 1983 | Think Tank Educational Soft. |
| Sinclair ZX Spectrum cass. | Pickpocket | 1983 | Gemini Marketing, Ltd. |
| Sinclair ZX Spectrum cass. | Pinball | 1983 | Sagittarian Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Pirate | 1983 | Chalksoft Ltd. |
| Sinclair ZX Spectrum cass. | Pitfall | 1983 | Infinite Soft. |
| Sinclair ZX Spectrum cass. | Pitman Seven Model VS-01-48 | 1983 | Visions Soft. Factory |
