Player 1: Drop through player 2's portal below you and you'll land on the upper platform near the exit. Now wait for player 2 to get up to the upper platform opposite. Now set a portal on the panel below them (that you fell through), and an exit portal on the vertical wall to your right.
Player 2: Get yourself up onto the platform where player 1 was originally and then set a portal down below you and then on the vertical wall to your left (near the ledge where player 1 is). Fall through and you'll land beside another red switch. Stand on it and by doing so, you'll both release the ball from the chute. Drop it in the lock below you to open the exit!
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.