Test Chamber 18 (Bonus)

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Test Chamber 18 (Bonus)

Chamber number 1.pngChamber number 8.png

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

Portal Prelude Test Chamber 18.png
Chamber icon cube dispenser on.pngChamber icon cube hazard on.pngChamber icon pellet hazard.pngChamber icon pellet catcher.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 on.pngChamber icon empty on.pngChamber icon empty on.pngChamber icon empty on.pngChamber icon cake.png

This is the fifteenth Bonus map of the game. It is unlocked when the original Test Chamber 18 has been completed.




  • To do


  • To do


  • To do

Award requirements

Please note the time challenge's awards are arranged in the reverse order.

Portals Steps Time
Bronze Silver Gold Bronze Silver Gold Bronze Silver Gold
7 Portals 5 Portals 3 Portals 160 Steps 140 Steps 120 Steps 93 Seconds 125 Seconds 155 Seconds

Video strategies

  • To do

See also