GTTV rolls into GDC with one of our biggest episodes yet! Valve has shocking news and footage from Left 4 Dead 2: The Passing, Sony’s Jack Tretton gives us details on the new Move controller, and David Cage breaks news on Heavy Rain DLC. Plus, we've got your first look at Isaac's new suit in Dead Space 2, news on a new multiplayer mode in Crackdown 2, and Daniel meets with physicist Michio Kaku to explain the science of Mass Effect 2.