G4TV writes: "Over the holidays, X-Play's Mike Demski and Michael Leffler booted up the latest Borderlands downloadable content, Mad Moxxi's Underdome Riot. Rather than focusing on a singular, self-contained story like The Zombie Island of Dr. Ned, Moxxi focuses on team-based arena combat. You and your buddies go in a room, enemies spawn in waves, you kill them all, rinse, repeat. Having spent many hours playing Horde mode in Gears of War 2 as well as Firefight mode in Halo 3: ODST, the promise of fighting endless waves of enemies with Hellfire SMG's and Volcano sniper rifles seemed like a very appealing proposition. Both have offered their take on Gearbox's DLC, with some mixed results to their shared experience."