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Test Chamber 13 (Bonus)

Chamber number 1.pngChamber number 3.png

Test Chamber Infobox previous disabled.png
Test Chamber Infobox next.png
Test Chamber Infobox Portal Guy.png
Chamber progress 1.pngChamber progress 3.pngChamber progress slash.pngChamber progress 1.pngChamber progress 9.png

Portal Test Chamber 13.png
Chamber icon cube dispenser.pngChamber icon cube hazard on.pngChamber icon pellet hazard on.pngChamber icon pellet catcher on.pngChamber icon water hazard.png
Chamber icon fling enter.pngChamber icon fling exit.pngChamber icon turret hazard.pngChamber icon dirty water.pngChamber icon cake.png

This is the first Bonus map of the game. It is unlocked when the original Test Chamber 13 has been completed.




  • When retrieving the Weighted Storage Cube, try to use the same portal that you placed on the bottom.
  • Place a portal on the wall next to the Heavy Duty Super-Colliding Super Button in the next room.
  • Make a save before attempting to throw the Cube onto the other button.
  • Walk though the same portal on the wall near the button when reaching the exit.


  • Use floor-to-floor portals to reach the Cube and Button.
  • Fire the same color portal that you exit out of. This will not make the step counter go up.
  • Make two portals to make to land on the button.
  • Be sure to get within range of the cube to pick it up before making a portal to the top button in the next room.
  • Portal the cube onto the other button. If you can't see it, revert to an earlier save.
  • Place a portal on the floor, and another on the floor near the exit.
  • Use floor-to-floor to get as close as possible to the Chamber lock.


  • Grab the Cube though the portal, don't waste time traveling into the portal to place it on the button.

Award requirements

Portals Steps Time
Bronze Sliver Gold Bronze Sliver Gold Bronze Sliver Gold
9 Portals 5 Portals 4 Portals 30 Steps 25 Steps 10 Steps 40 Seconds 30 Seconds 19 Seconds

Video tips