25 wads
| File | Name | Author | Iwad | Demos | Length |
|---|---|---|---|---|---|
| icon2 | icon2 | Ed Cripps | doom2 | 3 | 3:46 |
| iconic01 | iconic01 | Mr. Chris | doom | 1 | 7:31 |
| ics | I Can't Sleep | OverflowingMocha | doom2 | 1 | 0:52 |
| id1 | Legacy of Rust | id Software, Nightdive Studios, MachineGames | doom2 | 7 | 9:24 |
| idbest | idbest | Chris Dale | doom | 3 | 4:45 |
| idgaf1 | idgaf1 | gggmork | doom2 | 2 | 5:03 |
| iditarod | iditarod | Myscha, the Sled Dog | doom2 | 6 | 35:17 |
| idmqwcon | Idoom mapping contest ... | Various | doom2 | 1 | 4:06 |
| iepiss | iepiss | Impboy4 | doom | 2 | 2:17 |
| if | Infernovasion | The_SloVinator aka The_DooMinator | doom | 1 | 36:03 |
| igiveup | I Give Up On Trying to... | MegaZzZeux | doom2 | 2 | 4:29 |
| ihic | ihic | Josh Sealy | plutonia | 4 | 27:47 |
| iilcmap01 | iilcmap01 | rdwpa | doom2 | 5 | 14:56 |
| ikeep | The Ice Keep | HotCoffee | doom | 1 | 6:23 |
| ill_engn | illicit engineering | null1024 | doom | 11 | 1:12:05 |
| illumi | Illuminatus v1.1.4 | Cory Scott (NiTROACTiVE) | doom2 | 8 | 33:42 |
| illumi_2018 | Illuminatus v1.0.1 | Cory Scott (NiTROACTiVE) | doom2 | 36 | 6:15:54 |
| ilusory1 | ilusory1 | Brett Librandi | doom | 2 | 17:48 |
| immortal | Immortal | Richard J. Sham | doom2 | 2 | 7:29 |
| imp1 | imp1 | Jon Davis | doom | 1 | 3:03 |
| impact | Impact | greendingbat | doom2 | 2 | 1:40 |
| imparena | imparena | Mike Watson | doom2 | 1 | 5:31 |
| impoffer | impoffer | Cynical | doom2 | 2 | 18:39 |
| impsev2 | impsev2 | gggmork | doom2 | 1 | 5:26 |
| impzone | impzone | John Warren | doom | 10 | 8:23 |