Test Chamber 18

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Test Chamber 18

Chamber number 1.pngChamber number 8.png

Test Chamber Infobox previous.png
Test Chamber Infobox next disabled.png
Test Chamber Infobox Portal Guy.png
Chamber progress 1.pngChamber progress 8.pngChamber progress slash.pngChamber progress 1.pngChamber progress 9.png

Portal Test Chamber 18 Advanced.png
Chamber icon cube dispenser on.pngChamber icon cube hazard on.pngChamber icon pellet hazard on.pngChamber icon pellet catcher on.pngChamber icon water hazard on.png
Chamber icon fling enter on.pngChamber icon fling exit on.pngChamber icon turret hazard on.pngChamber icon dirty water on.pngChamber icon cake.png

This is the sixth and final advanced chamber of the game. This version is unlocked when the original Test Chamber 18 has been completed.

Extra challenges

  • Removed some portal conductive walls.
  • Pellet launcher has been removed.
  • Harder flinging when retrieving the Weighted Storage Cube.
  • Platforms lower when traversed though a portal.




- in progress -

Video walkthrough

Download Download demo file

Related achievements

Beat two Portal advanced maps.
Beat four Portal advanced maps.
Vanilla Crazy Cake
Vanilla Crazy Cake
Beat all six Portal advanced maps.

See Also