D3 Publishing and Trendy Entertainment have announced that Dungeon Defenders will launch on XBox Live beginning October 19, 2011. Dungeon Defenders blends up tower defense with action-RPG for a perfect puree of four-player co-op goodness. Players control one of four distinct classes in a bid to fight back an ancient evil. A combination of real-time strategy and fast-paced hack and slash action must be used to prevail. The game also features drop-in/drop-out four-player co-op online or off, character customization, lootastic gear drops, tradable pets and “tons” of game-play modes. Check out the trailer below and tell us what you think about Dungeon Defenders.