Gearbox's Randy Pitchford made a pretty bold claim when he said that the new Borderlands DLC, "Mad Moxxi's Underdome Riot," would comprise more than just new levels, but an entirely new mode as well. After an hour or so spent battling it out in Moxxi's tournament, we're happy to report that, though it doesn't feel like a brand new game, it provides a welcome shake-up of the main story's quest-based structure. Read on to see if Mad Moxxi's going to be worth your ten bucks when it arrives on Dec. 28 on Xbox 360 and Jan. 7 on PS3.