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Portal 2
Strategy Guide

First Published: 30-06-2011 / 00:00 GMT
Last Updated: 31-10-2019 / 18:45 GMT
Version: 1.0 (????) 29-03-2020 / 02:39 GMT

Portal 2 Guide

5 months ago · Guide Information

Chapter 2 - The Cold Boot

Chamber 7

Once the two Companion Cubes have been disintegrated by GLaDOS, place one between the beam to break it, lowering the platform behind you.

Place a portal directly under it and once you’re standing on the platform, fire off the exit portal at the vertical wall behind it to re-engage the beam, taking the platform upwards to the next floor.

At the top you'll notice two angled walls on your left. Fire a portal at the angled wall farthest away and then drop back down towards the Companion Cube.

Walk back through the portals and you’ll reappear with the Cube on the upper level of the chamber. Drop the Cube down by your side and then look back down towards the beam below you.

Look for what colour the portal is below you and change its location so it's facing upwards. Pick up the Companion Cube and fall down towards the portal, you'll fly out of the angled wall towards the red button.

Replace the portal that was on the right-hand angled wall onto the left-hand wall and fall back down into the portal below you.

You’ll gain enough momentum to come out at the top right towards the exit!

Missable Achievement/TROPHY ALERT!


You need to take the Companion Cube with you to the elevator for the 'Preservation of Mass' Achievement/Trophy. To do this, once you reach the end of the chamber, shoot a portal at the wall just past the exit door, drop down and grab the Cube. Now fall into a portal on the ground below and you can carry it to the elevator from here!


Guide Information

  • Publisher
    Valve Corporation
  • Platforms
    PC, PS3, 360
  • Genre
  • Guide Release
    30 June 2011
  • Last Updated
    31 October 2019
  • Guide Author

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