| I Dwell in Possibility (ver. 2.01) | Dr Lancer-X ◪ | 2016-05-08 |
| 283 |
| Ice Planet: KMC Version | Scribbit | 2000-01-10 |
| 271 |
| Idiocy | commodorejohn ◪ | 2002-12-01 |
| 124 |
| Idiopolis | Jester / Jauhis | 2004-01-03 | No reviews. | 118 |
| Illusions: Chronicles Book 1 | Scott Barnes | 1997-05-04 |
| 123 |
| Inferno 1: The Three Chronicles | John & Andrew Aes | 2000-06-10 | No reviews. | 109 |
| Insane World | Sparker ◪ | 2003-03-02 |
| 121 |
| Insanifest | inmate2993 ◪ | 2000-09-17 |
| 395 |
| Insomnia Simulator (ver. 1.1) | GetDizzy ◪ | 2021-01-02 | No reviews. | 95 |
| Instant Evil | Anthony Aybar ◪ | 2002-10-16 |
| 104 |
| IRC World Version 1.0 | BEHOLDER | 2002-11-08 |
| 110 |
| Irradiation (ver. 2.0) | GetDizzy ◪ | 2004-11-15 |
| 117 |
| Island of Snooble, The | David Walker | 1997-03-07 |
| 108 |
| Isle of Dragons | Steven Richmond | 1998-11-03 |
| 105 |
| Isolation | ShloobeR ◪ | 2006-03-10 |
| 105 |
| Itch Quest I | xBig_D | 1997-08-29 |
| 114 |
