If you want a behind-the-scenes look at what should be a challenging and satisfying puzzle-based game, here's a new interview video. Portal 2 intends to tax your brain in addition to your reflexes, and playing with others should be pretty darn entertaining as well. Just don't look at the screenshots and mistake this for a first-person shooter...that'd be quite a big mistake. Call of Duty, this ain't.
3/16/2011 Ben Dutka