Borderlands Double Game Add-On Pack: The Zombie Island of Dr. Ned / Mad Moxxi's Underdome Riot An in-game bank to store collected items and avoid cluttering your growing inventory and skill points as mission rewards (Mad Moxxi's Underdome Riot). The first two Borderlands game add-on packs, The Zombie Island of Dr. Nex and Mad Moxxi's Underdome Riot, together on one game disc. The new explorable region of Jocob's Cove, containing further sub-regions and 20 unique Borderland missions (The Zombie Island of Dr. Ned). New undead enemies, including Pumpkin Heads, Tankenstein and others along with new unique weapons (The Zombie Island of Dr. Ned). Three new Riot Arenas allowing for multiplayer support, including coop (Mad Moxxi's Underdome Riot). An in-game bank to store collected items and avoid cluttering your growing inventory and skill points as mission rewards (Mad Moxxi's Underdome Riot). The first two Borderlands game add-on packs, The Zombie Island of Dr. Nex and Mad Moxxi's Underdome Riot, together on one game disc. The new explorable region of Jocob's Cove, containing further sub-regions and 20 unique Borderland missions (The Zombie Island of Dr. Ned). New undead enemies, including Pumpkin Heads, Tankenstein and others along with new unique weapons (The Zombie Island of Dr. Ned). Three new Riot Arenas allowing for multiplayer support, including coop (Mad Moxxi's Underdome Riot).