| I Dwell in Possibility (ver. 2.01) | Dr Lancer-X ◪ | 2016-05-08 |
| 208 |
| Ice Planet: KMC Version | Scribbit | 2000-01-10 |
| 221 |
| Idiocy | commodorejohn ◪ | 2002-12-01 |
| 99 |
| Idiopolis | Jester / Jauhis | 2004-01-03 | No reviews. | 94 |
| Illusions: Chronicles Book 1 | Scott Barnes | |
| 97 |
| Inferno 1: The Three Chronicles | John & Andrew Aes | | No reviews. | 84 |
| Insane World | Sparker ◪ | |
| 93 |
| Insanifest | inmate2993 ◪ | 2000-09-17 |
| 337 |
| Insomnia Simulator (ver. 1.1) | GetDizzy ◪ | 2021-01-02 | No reviews. | 63 |
| Instant Evil | Anthony Aybar ◪ | 2002-10-16 |
| 78 |
| IRC World Version 1.0 | BEHOLDER | |
| 83 |
| Irradiation (ver. 2.0) | GetDizzy ◪ | 2004-11-15 |
| 86 |
| Island of Snooble, The | David Walker | 1997-03-07 |
| 87 |
| Isle of Dragons | Steven Richmond | |
| 77 |
| Isolation | ShloobeR ◪ | 2006-03-10 |
| 83 |
| Itch Quest I | xBig_D | 1997-08-29 |
| 92 |
