Portal 2 comes packed with a lengthy and hilarious single-player mode, but we didn't want to ruin any of the surprises for you. Instead, Reiner and I decided to take a look at the biggest addition to Portal 2: the co-op mode.

Watch as Reiner brags about his incredible abilities while showcasing an amazing inability to actually accomplish anything without my sage knowledge. In this 15-minute video, we take down several brain-bending co-op puzzles in record time. Feel free to leave comments attempting to deflate Reiner's massive ego. He's been walking around the office talking about how he's the greatest Portal player in the world all week.


Want to watch more Reiner and Phil adventures? Check out the Complete Collection on Reiner's blog.