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Part 25
Portal

Part 25

Complete Portal Part 25 walkthrough, including how to get past pistons and destroy turrets.

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Complete Portal Part 25 walkthrough, including how to get past pistons and destroy turrets.

Walkthrough
  1. 1
    Approach the piston, crouch, and look left. Shoot a portal above the brown portion of the wall where the piston is hitting.
  2. 2
    Go back to where the pipe curves down (near where you landed after you jumped). Face the wall, then shoot a portal near the very bottom (barely above the water). When you see the piston against the wall, jump.
  3. 3
    Ride the piston back, then jump on the walkway. Continue along until you reach a square of fencing. Jump over the fencing and fall through.
  4. 4
    Upon landing, turn and face the open duct to the right. Climb through.
  5. 5
    Continue along the path. When you reach what seems to be three pistons, be warned that it is a trap, but there is no way to avoid it. Jump onto them.
  6. 6
    After falling, look towards the wall.
  7. 7
    When you drop down, the doors will open and turrets will be behind them. When they appear, shoot a portal under them, then shoot the other elsewhere. This will destroy them.
  8. 8
    After you are finished with the turrets, look through the cubbies for it floating under a grabber claw.
  9. 9
    Grab a barrel and place it near the grabber arm in one of the cubbies, then jump up on it.
  10. 10
    Press and hold the use key with the cursor over the hand. It will raise.
  11. 11
    Either jumping or on a barrel, shoot a portal at the white wall through the hole. Walk through the other portal.
  12. 12
    If you fell down, turn around and shoot a portal at the wall just above the pipe. Shoot the other portal elsewhere, then go through.
  13. 13
    On top, go to the far left of the pipe (when facing the chain link fence wall below) and jump to the platform ahead.
  14. 14
    Go to the small hole in the far corner, then shoot a portal through. Find another wall to shoot a portal, then go through.
  15. 15
    On the other side, dispose of the turret.
  16. 16
    When the door opens, exit, then turn around and shoot a portal at the upside of the door you just came out of. Shoot the other at your feet.
  17. 17
    As you are falling, shoot a portal where you would land if you hit the ground. You will be flung up to a platform.
  18. 18
    Continue along the platform. At the end, go through the door.
Tips
  • This portion of the game is really hard, so reading the next paragraph before attempting it is advised.
  • The three pistons are a trap, but unavoidable.
  • The turrets can be destroyed by placing a portal beneath them and another elsewhere.

Commentary Nodes:

  • After landing, turn and face the open duct to the right. Climb through. [Ellen McClane: Voice of GLaDOS]
  • After falling, look towards the wall. [Scott Dalton]
  • After you are finished with the turrets, look through the cubbies for it floating under a grabber claw. [Greg Coomer]

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