Portal 2 Co-op Walkthrough / Course 1 - Part 4 - Room 04/06 HD
Watch more Portal 2 Walkthroughs videos: http://www.howcast.com/videos/465239-Portal-2-Coop-Walkthrough-Course-1-Part-4-Room-0406 Check out this Portal 2 Co-op walkthrough and beat Course 1 - Part...