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Part 27
Portal

Part 27

Navigate Part 27 of the Portal walkthrough, overcoming turret ambushes and using portal momentum to reach new areas, including the catwalks.

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Navigate Part 27 of the Portal walkthrough, overcoming turret ambushes and using portal momentum to reach new areas, including the catwalks.

This section of the walkthrough covers Part 27 of Portal, focusing on navigating areas with turrets and utilizing portal mechanics to progress through cubbies and catwalks.

Walkthrough
  1. 1
    After deactivating turrets, locate two cubbies stacked vertically with a slanted roof above the top one. Shoot a portal on this slanted roof.
  2. 2
    Shoot the other portal at your feet. As you gain momentum, shoot another portal where you will land.
  3. 3
    Continue this portal momentum technique until you can shoot a portal at the far slanted roof on the opposite wall, slightly higher than the first.
  4. 4
    When exiting the higher portal, shoot the opposite colored portal where you will land. If executed correctly, you will land on a platform.
  5. 5
    Proceed along the path until two turrets are dropped by grabber hands. Defeat them.
  6. 6
    Shoot a portal at the red light on the ground beneath a square opening.
  7. 7
    Run back to the ledge and jump off. Shoot the opposite colored portal where you would land.
  8. 8
    While flying, move the analog stick towards the ground. After landing, look up (away from the pit) to find a white wall behind a railing.
  9. 9
    Shoot a portal on this white wall and the other at your feet. Proceed through the door.
  10. 10
    Continue along the catwalk to the end, then go through the door.
  11. 11
    At the intersection, go left. Continue to the end, then go up the stairs and through the door.
  12. 12
    Pass through the energy field at the end to encounter the computer.

Commentary:

  • The initial turret ambush was designed to be more massive but was toned down to better fit the game's progression, focusing more on portal momentum.
  • The catwalks, initially decorative, were made accessible and necessary for progression due to player interest during testing.

Computer Interaction:

Upon reaching the computer, it will express congratulations and lament your destructive behavior. It will then announce a surprise deployment, which malfunctions, revealing an unknown object. The computer will advise against interacting with this object, claiming it will worsen your situation.

If you choose to wait before picking up the sphere, the computer will offer a series of increasingly sarcastic and contradictory advice, urging you to either leave it alone or pick it up.

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