Just like in Portal, momentum is key, and at times you’ll want to fly through portals as fast as you can so that you soar out the other side. As two colourful creatures you and a friend step through gravity-swapping portals to platform through levels, bouncing off each other's heads as you go. It’s not anywhere near as funny, but it requires just as much teamwork and coordination to complete. We recommend Ibb & Obb for those that can’t get enough of Portal 2’s co-op campaign.
