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Portal 2 Hints
How can I get to the exit door?
1 of 8: The first thing to do is get past the laser beam that's shooting across the chamber.
2 of 8: The easiest way to do that is to simply jump over the beam, since it's low enough for that to work. Alternatives include using portals on portal-friendly walls to bypass the beam, and using portals to knock down the nearby camera so you can use it to block the beam.
3 of 8: Look on the wall a ways to the left of the exit door's higher floor to find the receptacle device that the laser beam needs to be redirected into.
4 of 8: As you can see, there's no way to redirect the beam into the receptacle using portals. You'll have to use one of the new beam-deflecting redirection cubes instead.
5 of 8: Pick up the cube and jump back over the laser beam, then slowly push the cube into the laser beam so that it'll be redirected.
6 of 8: Move around to where the beam gets redirected into the receptacle device, then drop the cube. If it lands correctly, the beam should continue to be redirected into the receptacle.
7 of 8: That raises some metal plates that you can use like a staircase to get up onto the exit door's higher floor.
8 of 8: ALTERNATIVE: Instead of using the cube to redirect the beam, drop it on the floor near the higher floor, then jump onto it. Jump up and down on the cube so you can see the higher floor, which is portal-friendly. Fire a blue portal onto the higher floor, then get off the cube and put an orange portal on a portal-friendly wall section. You can then go through the orange portal to get onto the higher floor.
