Portal 2 Hints

How can I get that door open?

  • 1 of 6: Notice the large X that's on the wall just to the left of the door.
  • 2 of 6: Visually follow the blue dots that lead from the X to the door-opening device.
  • 3 of 6: It's a large red floor button, so how might you activate it?
  • 4 of 6: Why not try standing on it?
  • 5 of 6: Doing so will open the door.
  • 6 of 6: However, when you get off the button, the door will immediately close.