2K Games announced that the Borderlands Double Game Add-On Pack featuring the grisly The Zombie Island of Dr. Ned and the challenging Mad Moxxi's Underdome Riot is now available in stores in North America for the Xbox 360 and Windows PC. Developed by Gearbox Software, the Borderlands Double Game Add-On Pack combines the exhilarating first two Borderlands add-on packs that further enhance the gameplay experience and brings them to retail shelves for the first time.

Complete with extensive co-op integration that seamlessly blends the single-player and multiplayer experiences, both The Zombie Island of Dr. Ned and Mad Moxxi's Underdome Riot allow players to freely join or leave each other's games at any time for collaborative mayhem or the freedom to enjoy the game in full single-player mode. It also includes the groundbreaking weapon generation system that offers more than 16 million weapons from which to choose. Like many things in life, playing the Borderlands Double Game Add-On Pack with others is more fun than playing alone.

The Zombie Island of Dr. Ned takes fans from the barren wastelands to a creepy island overflowing with what's left of the rotting workers of Jakobs Cove. Dr. Ned was tasked with saving them, but has done his job a little too well by creating flesh-eating zombies and other ghastly abominations that now run rampant in this region. Players will have to work alongside Dr. Ned as they embark on an explosive journey to cure the decaying inhabitants of Jakobs Cove in this full-fledged expansion filled with new formidable enemies, grueling quests and rare loot drops.

In Mad Moxxi's Underdome Riot, fans must face the ever-changing underdome riot that challenges every shooter skill known to gamers. The all-new Riot Mode challenges players to test their weaponry against hordes of menacing antagonists who are thirsting for carnage in tournaments where the rules of warfare are constantly changing. Mad Moxxi's Underdome Riot also offers several new game features, including an all-new bank feature that provides extra storage capacity for weapons of devastation and the ability to gain two new skill points.

Borderlands is currently available for Xbox 360, PlayStation 3 and PC. For more information, visit www.borderlandsthegame.com.