Portal 2 Chapter 8 Test Chamber 16

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Portal 2 Chapter 8 Test Chamber 16
sp_a4_jump_polarity.bsp Repulsion Polarity

Chamber number 1.pngChamber number 6.png

Test Chamber Infobox previous.png
Test Chamber Infobox next.png
Test Chamber Infobox Portal Guy.png
Chamber progress 1.pngChamber progress 6.pngChamber progress slash.pngChamber progress 1.pngChamber progress 9.png

Portal 2 Chapter 8 Test Chamber 16.png
Chamber icon player button on.pngChamber icon laser sensor.pngChamber icon laser redirection.pngChamber icon turret hazard on.pngChamber icon laser hazard.png
Chamber icon excursion funnel on.pngChamber icon excursion switch on.pngChamber icon propulsion gel.pngChamber icon repulsion gel on.pngChamber icon dirty water.png

This is the fifty-sixth level of the game, and takes place within an incomplete Aperture Science Test Chamber. This level features both the Excursion Funnel and Repulsion Gel, and demonstrates the way in which the Gel can be used to dispose of some threats. Turrets are present as an additional hazard in this level.






  • Test Chamber 16 (Wheatley)


  • Go through Wheatley's Test Track.


  • Shoot portals on the Conversion Gels on both sides and go through the portal.
  • Go through the door. Shoot a portal on the wall below the Repulsion Gel.
  • Place the other portal on the floor and go through it.
  • Fire a portal at the end of the Excursion Funnel above.
  • Push the Switch.
  • Now the gel should flow in the Funnel. Wait for the timer to stop and then put the other portal on the wall.
  • Now place the same portal at the end of the Funnel. Press the Switch and quickly jump from the gel into the Funnel.
  • Wait until you've passed the Turrets and then go stand on the button.
  • Wait for the gel to pass through the portal as much as it can and then shoot the other portal on the wall on the right - above the Turrets - and leave the button.
  • Watch for the gel to go on top of the third Turret and then shoot the same portal on the floor. All three of the Turrets should bounce away.
  • Push the Switch on the other side of the glass.
  • Now go in the funnel and wait until you reach the ceiling.
  • Shoot the other portal on the angled wall and wait until you land on solid ground.
  • Go in the Chamberlock.

Video walkthrough

Download Download demo file

Related achievements

Smash TV
Smash TV
Break 11 test chamber monitors


Main article: Portal 2 soundtrack

TEST by Aperture Science Psychoacoustics Laboratory [6:14] | Download Download | Play icon.png Play
Excursion Funnel by Aperture Science Psychoacoustics Laboratory [4:32] | Download Download | Play icon.png Play


GLaDOS: Alright, he's not even trying to be subtle anymore... ...or maybe he still is, in which case, wow, that's kind of sad.
Wheatley: Sorry, sorry, my fault.
Wheatley: Butterfingers.
GLaDOS: Either way, I get the impression he's about to kill us.
Wheatley: Carry on.
Wheatley: Only three more chambers 'til your big surprise. [EVIL LAUGH]
Wheatley: Oh, that's--- that's tiring.
Wheatley: Oh. You solved it? Good. Good one. Good for you.
GLaDOS: So, he's inexplicably happy all of a sudden, even though he should be going out of his mind with test withdrawal. AND he's got a surprise for us. What did he FIND back there?


  • According to this, it's said that only one world portal is left in the whole game. This one can be found at the end of the level.
  • According to this, the destruction sequence before entering the actual chamber was added to remind players that they could get to the repulsion gel pipe without the need for the Excursion Funnel. (The portal placements to cross both gaps, into a floor and out of a wall, are intentionally identical to further this reminder.)
    • Before the event was added, playtesters focused too much on the Excursion Funnel and tried to use it to cross the gap.