Player 1: Look to the wall in the far centre of the room and you should spot two platforms. Place your first portal on the lower half of the wall by left-hand platform and the second portal on the lower half of the wall of the right-hand platform.
Player 2 : Run to the centre of the room and pick up the Displacement Cube, aim it so you’re directing the beam into the receptor on the left-side of the room (raising the spiked barricade).
Player 1: Once the spikes have risen up high enough, run onto the platform and then have player 2 switch the laser to the receptor on the wall near you. This will cause the platforms to raise and fall, so cross over to the second platform.
Player 2 : Once player 1 is waiting on the second platform, rotate the beam to your right and line it up with the receptor over on the wall here. This’ll will cause player 1’s platform to drop as the spikes raise upwards.
Player 1: Keep jumping into the spiked barricade until you have enough space to fit in, then jump over the beam and set your exit portal on the wall to the left of the exit. This will allow player 2 to step through the first portal and join you by the exit!