| Sinclair ZX Spectrum cass. |  Humpty in the Garden | 1984 | Artic Computing, Ltd. |
| Sinclair ZX Spectrum cass. | Hunchback P | 1984 | Ocean Soft., Ltd. 13156 |
| Sinclair ZX Spectrum cass. | Hunchback II - Quasimodo's Revenge | 1984 | Ocean Soft., Ltd. 13156 |
| Sinclair ZX Spectrum cass. | Hustler | 1984 | Bubble Bus Soft. |
| Sinclair ZX Spectrum cass. | Hyperaction | 1984 | Silversoft |
| Sinclair ZX Spectrum cass. | Hyperblaster | 1984 | MC Lothlorien |
| Sinclair ZX Spectrum cass. | I Will Survive! | 1984 | Aztec Soft. |
| Sinclair ZX Spectrum cass. | I'm in Shock | 1984 | Artic Computing, Ltd. |
| Sinclair ZX Spectrum cass. | Ice Attack | 1984 | QBIT |
| Sinclair ZX Spectrum cass. | Incredible Adventure | 1984 | CRL Group PLC London, England |
| Sinclair ZX Spectrum cass. | Infernal Combustion | 1984 | Strange Loop |
| Sinclair ZX Spectrum cass. | Inkosi | 1984 | Chalksoft Ltd. |
| Sinclair ZX Spectrum cass. | Insurgency | 1984 | CCS Cases Computer Simulations, Ltd. London, England |
| Sinclair ZX Spectrum cass. | Intercepteur Cobalt | 1984 | Ere Informatique Paris, France |
| Sinclair ZX Spectrum cass. | Intercepteur Cobalt | 1984 | Software Center Spain |
| Sinclair ZX Spectrum cass. | Interceptor | 1984 | Ediciel Matra & Hachette Paris, France |
| Sinclair ZX Spectrum cass. | Invasion Force | 1984 | Micromania France |
| Sinclair ZX Spectrum cass. | Invasores | 1984 | Duplinter Spain |
| Sinclair ZX Spectrum cass. | It's the Wooluf! | 1984 | Crystal Computing |
| Sinclair ZX Spectrum cass. | It's the Wooluf! | 1984 | Crystal Computing |
| Sinclair ZX Spectrum cass. | Italian is Fun | 1984 | CDS Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Jack and the Beanstalk Model JBS | 1984 | Thor Computer Soft. |
| Sinclair ZX Spectrum cass. | Jacks Night Out | 1984 | Harbour Soft |
| Sinclair ZX Spectrum cass. | Jangler Model SP232 | 1984 | Profisoft Germany |
| Sinclair ZX Spectrum cass. | Jasper! Model QTC729 | 1984 | Micromega |
| Sinclair ZX Spectrum cass. | Jeremy | 1984 | King Soft. |
| Sinclair ZX Spectrum cass. | Jericho 2 | 1984 | Elephant Soft. |
| Sinclair ZX Spectrum cass. | Jericho Road | 1984 | Shards Soft. |
| Sinclair ZX Spectrum cass. | Jerico 2 | 1984 | Elephant Soft. |
| Sinclair ZX Spectrum cass. | Jersey Quest | 1984 | WD Soft. |
| Sinclair ZX Spectrum cass. | Jet Set Willy | 1984 | Software Projects, Ltd. |
| Sinclair ZX Spectrum cass. |  Jet Set Willy | 1984 | Spectrum Vision Spain |
| Sinclair ZX Spectrum cass. | Jet Set Willy: April Showers | 1984 | Future Publishing, Ltd. UK |
| Sinclair ZX Spectrum cass. | Jet Set Willy: Spectrum Computing | 1984 | Spectrum Computing |
| Sinclair ZX Spectrum cass. | Jeu de Dames | 1984 | Loriciels France |
| Sinclair ZX Spectrum cass. | Jogger | 1984 | Severn Soft. |
| Sinclair ZX Spectrum cass. | Johnny Reb | 1984 | Zafi Chip |
| Sinclair ZX Spectrum cass. | Jokers Wild | 1984 | Phoenix Soft. |
| Sinclair ZX Spectrum cass. | Jump | 1984 | Ventamatic Spain |
| Sinclair ZX Spectrum cass. | Jumpy Snake Blues And Honky Tonk | 1984 | Software Cottage |
