Player 1: Set your portals to the right of the two tall wall indents straight ahead (so you once again set up an ‘infinite portal’).
Player 2 : Jump into the ‘infinite portal’ like a good player.
Player 1 : Now on the first horizontal panel to your left (near the ground), set your EXIT portal and watch as player 2 zips up high into the air.
Player 2 : As you reach the switch (either on the way up or on the way down), press the action button.
Player 1: Immediately after placing the first horizontal portal, go left and set your ENTRANCE portal on this panel. This will allow player 2 to retain their velocity as they pass through both portals.
Player 2 : You should find yourself sailing up the other side of the wall as soon as you’ve pressed the other button up near the top, you’ll release the weight ball.
Now drop it in its required are and the exit will open up.
Welcome back to Aperture Science, a world where your Companion Cube isn't you're only company. Take control of Chell once again in Valve's sequel which takes you on an humorous and puzzling adventure and in our detail-packed guide we'll show you:
How to solve every test chamber first time.
Conquer every co-op chamber with a friend.
Loads of High Definition screenshots and videos showing you the solutions to every single chamber.
High Definition strategy videos for every achievement in the game.
Uncover all of the hidden secrets and Easter eggs.