| 37977 | Insomnia | ZX-Spectrum 48K | English |
| 24500 | Inspector | ZX-Spectrum 48K | English |
| 6486 | Inspector Flukeit | ZX-Spectrum 48K | English |
| 20786 | Inspector Flukeit + The Great Peepingham Train Robbery | ZX-Spectrum 48K | English |
| 2489 | Inspector Gadget and the Circus of Fear | ZX-Spectrum 48K | English |
| 9850 | Inspector Inch | ZX-Spectrum 48K | English |
| 7481 | Inspiration | ZX-Spectrum 128K | English |
| 22033 | Insta-Matchit | ZX-Spectrum 48K | English |
| 25810 | Instalment Payments | ZX-Spectrum 16K | English |
| 2000189 | Instant Arcade Games for the Sinclair ZX Spectrum | - | English |
| 26898 | Instant Command | ZX-Spectrum 16K | English |
| 11801 | Instant Recall | ZX-Spectrum 48K/128K | English |
| 39985 | Instant Screen | ZX81 16K | English |
| 2000190 | Instant Spectrum Programming | - | English |
| 8281 | Instant User Defined Graphics | ZX-Spectrum 48K | English |
| 21312 | Instrument | ZX-Spectrum 48K | English |
| 15748 | Insult Generator | ZX-Spectrum 48K | English |
| 42067 | Insult Megademo | ZX-Spectrum 48K | English |
| 41374 | Insulter | ZX81 16K | English |
| 20137 | Insurance Assurance | ZX-Spectrum 48K | English |