64 wads
| File | Name | Author | Iwad | Demos | Length |
|---|---|---|---|---|---|
| uac2 | uac2 | Kari Westerholm, Markku Steen, Janizdreg | doom2 | 1 | 55:12 |
| uacbase2 | uacbase2 | Brian Rowan | doom2 | 1 | 9:11 |
| uac_cave | uac_cave | Sam Dickie | doom2 | 1 | 7:11 |
| uac_cntr | uac_cntr | J.C. Bengtson | doom2 | 1 | 6:58 |
| uaccorp | uaccorp | Martin Friberg & Christopher Sund | doom2 | 4 | 17:33 |
| uac_dead | uac_dead | Leo Martin Lim | doom | 20 | 2:45:56 |
| uacdiot | UAC Scientists are tot... | AlektorophobiA | doom2 | 1 | 10:53 |
| uac_eb | uac_eb | BrassKnight | doom2 | 6 | 6:33 |
| uachq | uachq | Owen | doom | 1 | 4:17 |
| uaclabs | uaclabs | Eric Harris | doom2 | 3 | 10:04 |
| uacpen | uacpen | The Mad Hacker | doom | 2 | 24:56 |
| uacqry2 | UAC's Deep Quarry | Gustavo Ramos "Gustavo6046" Rehermann | doom2 | 1 | 2:19 |
| uacrfnry | uacrfnry | Ogre | doom2 | 1 | 1:27 |
| uacultra | uacultra | Jon Vail & Super Jamie | doom2 | 48 | 6:51:40 |
| ub | ub | Matt Walter | doom | 2 | 5:26 |
| uca | uca | Eddie Nguyen | doom | 2 | 8:38 |
| u_chasm | u_chasm | Chris Hansen | doom2 | 1 | 5:06 |
| ud1_10 | ud1_10 | Chris Welch | doom | 2 | 1:11 |
| ud1k | Death by 1000 Lines | Various | doom | 25 | 4:20:50 |
| ud94 | Undeath '94 | Various | doom | 1 | 38:19 |
| udino | The Ultimate Doom "In ... | Various | doom | 10 | 1:55:46 |
| udm05 | udm05 | Marek Wozniak | doom2 | 2 | 5:34 |
| udtwid | Ultimate Doom The Way ... | Various | doom | 11 | 17:09 |
| uhadron | (The Ultimate) Return ... | Matt "Cannonball" Powell | doom | 21 | 53:28 |
| ultim | ultim | Emil Eisenhardt | doom | 4 | 5:24 |
| ultima | Ultima 1 | Jon Charlson (Chaff) | doom | 3 | 1:09 |
| ultima6 | Ultima6, Lord British'... | Ken Wieczorek | doom2 | 2 | 1:11 |
| ultimate_1994 | ultimate_1994 | Sean Powers | doom | 20 | 1:22:32 |
| ultimate_2008 | ultimate_2008 | Justin Lloyd | doom2 | 4 | 5:35 |
| ultimatm | Ultimatum - Riding on ... | Various | doom | 1 | 32:36 |
| ultradm | ultradm | Scott Manganello | doom | 14 | 6:16 |
| umbrella | umbrella | Epyo | doom2 | 2 | 3:36 |
| umbring | umbring | Woody | doom | 1 | 15:02 |
| unalign | unalign | Ryath/scwiba | doom | 17 | 58:57 |
| unbeliev | UnBeliever | Ryath/scwiba | heretic | 28 | 43:17 |
| uncrtn | uncrtn | Mr. Chris | doom2 | 2 | 9:47 |
| undcrpt_2 | undcrpt_2 | Artem | doom2 | 1 | 3:14 |
| under | under | Mark Matheson | doom | 4 | 7:20 |
| undersea | undersea | Brian Plumb | doom | 1 | 4:41 |
| undertow | undertow | Gregory Dick | doom2 | 2 | 18:22 |
| undrfire | Under Fire for Doom 2 | Jeff Cruser | doom2 | 3 | 3:49 |
| undrseig | undrseig | Gene Spinks | doom2 | 1 | 2:07 |
| unfun | unfun | Adrian Roselli | doom | 4 | 3:07 |
| unhallowed | Unhallowed | CyanoBlugron | doom2 | 1 | 30:11 |
| unisin | unisin | Merlin of Pleth | doom2 | 6 | 1:42 |
| unknown | unknown | Dutch Devil | doom2 | 2 | 15:59 |
| unnamed | unnamed | Mr. Chris | doom2 | 1 | 9:12 |
| unrattled | UNRATTLED | Various | doom | 12 | 1:05:12 |
| unttld | Untitled | Thelokk | doom2 | 1 | 5:01 |
| unwisdom | Castle of Unwisdom | Ittaanip | doom2 | 1 | 2:25 |
| upliftng | upliftng | Bart Wilson | doom | 3 | 11:46 |
| uplink15 | uplink15 | Zoltan Schmidt | doom2 | 4 | 13:56 |
| upr | Unia Polityki Realnej WAD | Krzysztof Niekrasz | doom2 | 1 | 5:04 |
| uprising | Uprising | Cheesewheel | doom2 | 20 | 58:21 |
| ur | Unholy Realms | Various | doom2 | 227 | 9:05:59 |
| urania | urania | riderr3 | plutonia | 32 | 7:20:12 |
| urbanfr | urbanfr | ProcessingControl | doom2 | 1 | 9:35 |
| urbanside | URBAN SIDE | NoC0ncentrate51 | doom2 | 7 | 21:56 |
| urbnbeta | urbnbeta | Frederick Bradley & Robert Bradley & Ryan Louie | doom | 7 | 6:08 |
| urlove | Give Me All Your Love | dashiefrickintyan | doom2 | 3 | 12:11 |
| uroboros | Uroboros | Ravendesk | doom2 | 9 | 1:05:09 |
| utopia | utopia | Scott | doom | 2 | 8:13 |
| uuhhtod | uuuhhhtod | TimeOfDeath | doom2 | 1 | 3:23 |
| uwhotel | uwhotel | Ken Taggard | doom | 2 | 1:35 |