Borderlands: Mad Moxxi's Underdome Riot (c) Take 2 Interactive

01/2010 :..... RELEASE.DATE .. PROTECTION .......: Securom+DFA
- :.......... DISC(S) .. GAME.TYPE ........: Shooter

Mad Moxxi's Underdome Riot is an intense single-player or cooperative
experience that expands the mayhem by adding three new Riot Mode arenas
where players will endure an onslaught of Pandora's baddest enemies.
Working together, players will fend off the masses as they fight for fame,
honor, and more importantly, loot. Mad Moxxi's Underdome Riot also adds a
new bank feature, which allows players extra storage capacity for when they
encounter one of the more than 16 million weapons that Borderlands has to
offer; and the ability to acquire two additional skill points as quest
rewards, making their characters even more powerful than before.

1. Unrar into your installation directory. This is assuming that both the
original release and first DLC release are installed.
2. Play the game.

Note: For a number of reasons, mainly size, this is released in the games
section. It is packed this way because the DLC installer requires
authentification and an elaborate workaround isn't really worth the
trouble.