Test Chamber 12

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Test Chamber 12
level_04.bsp Derivations

Chamber number 1.pngChamber number 2.png

Test Chamber Infobox previous.png
Test Chamber Infobox next.png
Test Chamber Infobox Portal Guy.png
Chamber progress 1.pngChamber progress 2.pngChamber progress slash.pngChamber progress 1.pngChamber progress 9.png

Portal Prelude Test Chamber 12.png
Chamber icon cube dispenser.pngChamber icon cube hazard.pngChamber icon pellet hazard on.pngChamber icon pellet catcher on.pngChamber icon water hazard.png
Chamber icon fling enter on.pngChamber icon fling exit on.pngChamber icon turret hazard.pngChamber icon dirty water.pngChamber icon empty.png
Chamber icon empty.pngChamber icon empty.pngChamber icon empty on.pngChamber icon empty on.pngChamber icon cake.png

This Test Chamber is the thirteenth level of the game, and introduces the player to the supervisor Peter.



  • Proceed to the main room and go in front of the pipe.
  • Place a portal on the wall behind the pipe and the other on a wall near you, then pass through it.
  • Shoot the first portal under the High Energy Pellet Catcher, then go through the portal.
  • Put the other portal where the Pellet is bouncing, and come back in the test chamber entrance.
  • Look up to the vertical door. Place a portal on the white portion of the ceiling and the other on the floor.
  • Before passing through the portal, aim the white ledge above the vertical door. Then, fire your first portal on this place, after going through the portal.
  • Place the other portal under the vertical door and use momentum to reach the upper level.
  • Shoot a portal through through the pipes and pass through the other portal.
  • Proceed to the Chamberlock.

Video walkthough


13. Atmosphere 4 - 1:20 by ERH

See also