UAC Ultra

UAC Ultra is a 2010 WAD by Jamie Bainbridge (Super Jamie) and Jon Vail (40oz) which requires a Boom-compatible source port. It makes exclusive use of a set of custom textures created by Vail, and features two new monsters. It consists of 11 levels, and an inescapable "credits" level which prevents the player from progressing into the standard Doom II level set.

Most of the soundtrack is derived from the game Abuse, although it includes some tracks by Nick Baker and James Paddock.

Haymaker
This titan first appears on MAP07, and occurs as a mid-boss in subsequent levels. It brandishes a hammer with which it can launch mancubus fireballs. When moving, it appears to "skate" along the floor, remaining hunched forward until it attacks. It has 2500 hit points, almost matching that of the spiderdemon and identical to Scythe 2's Afrit, and is vulnerable to blast damage. While its head is borrowed from the cyberdemon, its body is derived from Heretic's Maulotaur, and shares the Maulotaur's death sound and animation.

Chimaira
This bizarre monstrosity is fought on MAP11, the last level of the WAD, and is best described as a mountain of flesh with three, giant tentacles. The player must discover and attack its weak points before the beast's mouth will open, whereupon they will be assaulted by a flurry of imp fireballs. The creature's heart, located far in the back of its mouth, must be attacked and destroyed to win the WAD. It has 1250 hit points, exactly five times that of Doom II's final boss.

Levels

 * MAP01: Dig
 * MAP02: UAC in Exile
 * MAP03: Sifting Adjunct
 * MAP04: Pyrolysis
 * MAP05: Hardware
 * MAP06: Collapsys
 * MAP07: Haymaker
 * MAP08: Worst Case Scenario
 * MAP09: Counteraction Terminal
 * MAP10: Skagway
 * MAP11: Sick