Mad Moxxi's Underdome Riot



Mad Moxxi's Underdome Riot is the second downloadable content pack for Borderlands. The DLC was released for the Xbox 360 on 29 December 2009 and for the PS3 and PC on 7 January 2010.


 * "Are you God's gift to gun fights? Think you're the best? Wanna prove it? Then help us celebrate the grand opening of Marcus Bank (a subsidiary of Marcus Corp) by killing hundreds and hundreds of people in Mad Moxxi's Underdome Riot, the only competitive arena around where your next of kin can be assured that you're coming back famous... or not at all. (All proceeds are kept by us)"

Features

 * Three new Riot Arenas
 * Bank to store items
 * Two additional skill points for both playthroughs as mission rewards
 * New game mode, with waves of enemies
 * 5 new trophies/achievements

Plot
Mad Moxxi is a thrill-seeking woman in search of a new husband. Having gone through three husbands already, her search has led her to becoming the Ring Master/Hostess and Commentator of the Underdome. She considers the Underdome and the excitement of the competition like matrimony and plans to stay only as long as the thrill lasts. Gameplay includes three new Riot Mode arenas where players will fight AI-controlled enemies (PvE) in single player or multiplayer. The add-on starts with a mission titled "Prove Yourself." in which players complete all three arenas.

Mechanics
The DLC can be accessed in-game by using the Fast Travel system and heading for the starting location of The Underdome. The gameplay consists of rounds and waves. Each round consists of five waves ending with a Boss wave. Every round brings an increased difficulty level. As the round number increases, the number of gameplay-altering rules increases, adding variables such as different gravity levels and modified enemy regeneration, accuracy, damage, etc. If a character is incapacitated and fails to achieve a second wind they will respawn in the Penalty Box on top of Moxxi's tower and the round will be reset. If the player is downed in a multiplayer game, they will respawn in the Penalty Box (from which they can still play an active role by sniping enemies) for the remainder of the wave.

No experience is gained from kills inside the Underdome and consequently weapon proficiencies are not affected, although it is still possible to complete challenges for experience.

Achievements
The achievement/trophy list for The Underdome:
 * Small Tournament Completed the lesser challenge in all 3 coliseums
 * Hell-Burbia Completed the larger challenge in the Hell-Burbia coliseum
 * The Angelic Ruins Completed the larger challenge in The Angelic Ruins coliseum
 * The Gully Completed the larger challenge in The Gully coliseum
 * Big Tournament Completed each of the larger challenges in all 3 coliseums

Trivia

 * The title "Mad Moxxi's Underdome Riot" is a reference to "Mad Max: Beyond Thunderdome".
 * In the trailer for the DLC, when Moxxi's first husband is shown, the Konami Code runs across the screen, shooting him.
 * The tournament audience sometimes gives a cheer of "Heyooo!" a greeting otherwise used by Steve. Steve is featured in many Borderlands promotional works, including the 'Borderlands Claptrap Web Series'.
 * Killing a humanoid opponent (such as a Bandit or Psycho) with a critical hit will usually prompt the cheer.
 * After players unlock the greater challenges, dead bandits can be seen buried with flowers planted on their exposed heads.