Borderlands Add-Ons 50% Off on Xbox 360 Until January 31!

All four add-on packs for Borderlands are half-off on Xbox 360 until January 31, making The Zombie Island of Dr. Ned, Mad Moxxi's Underdome Riot, The Secret Amory of General Knoxx and Claptrap's New Robot Revolution only 400 Microsoft Points each!