Defense Grid: You Monster Trailer

Available December 7th, 2011 In this first full-story expansion to the award-winning Defense Grid, GLaDOS, the menacing AI from Valve's awesome Portal franchise, guest stars and shakes up the Defense Grid world. Players will battle not only alien hordes, but the deviousness of GLaDOS as she tests the player's skills and changes all of the rules that you have come to know. Can you protect the cores in spite of her intrusive testing? Go to for more information or after December 7th visit Steam () to purchase the PC version or ( ) to purchase the Xbox 360 version. Requires the original game to play.