The definitive tower defense game for Xbox LIVE, Defense Grid: The Awakening is easy to pick up, engrossing to play, and hard to set down. Strategically place your towers on the map to prevent alien enemies from stealing your power cores. Play for just fifteen minutes or several hours! This award-winning game includes 10 hours of story play with 20 unique maps in the Awakening campaign, four bonus Borderlands maps, a wide variety of tower and enemy types, an interactive soundtrack, plus over 100 unlockable challenge modes adding dozens of hours of additional fun. Protect the Cores!