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As soon as you enter the test chamber, go left and then turn left again where you’ll spot a turret just up ahead. You need to quickly jump into the left-hand corner so you’re out of the turret’s line of sight.

Now dash behind the turret, pick it up from behind and drop it down into the chasm behind you. Turn back around and fire your first portal off into the chequered wall panel where the transport beam connects with the wall. The second portal should be positioned on the wall panel that’s facing directly opposite the stationary Experimental Cube (look for the Cube to your right - over the pit).

This’ll cause the transport beam to pick the Cube up, now stand on the red switch and this’ll reverse the transportation beams direction of travel. You’ll notice it turning orange and that the Cube is now getting drawn towards the portal.

Once the Cube reaches the portal, step off of the switch and fire a portal into the far left-hand corner of the wall directly opposite you, this should catch the Cube and carry it across the bottomless pit (to your immediate left).

Once the Cube approaches you, pick it up out of the beam and set it down on the switch, reversing the direction of the beam once again. Now step into the beam and it’ll carry you across the gap, and then jump out of the beam and onto the floor.

Adjust the portal further to the right (so it’s directly opposite the Cube/switch) and the resulting beam will push the Cube off of the switch.

Now turn around to face the exit and place a portal on the floor so the beam reaches up to the ceiling. Now simply step into the beam and walk into the exit, leading to the elevator and the next Chamber.

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Guide Information
  • Publisher
    Valve Corporation
  • Platforms,
    PC, PS3, XB 360
  • Genre
  • Guide Release
    30 June 2011
  • Last Updated
    7 December 2020
  • Guide Author

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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.

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