Player 2 : You need to fire your portal to the immediate left of the stairway and then on the wall to your left.
Player 2 : Set your portal on the wall where player 1's barrier ends and then a second exit portal on the other wall beside the stairs, creating a barrier that now covers both sides! Head up the stairs with player 1 and onto part 2!
Player 2 : Once player 1 has backpedalled far enough, immediately replace the vertical light bridge in front of them, preventing the turrets from tearing them to pieces!
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.