Portal 2 Chapter 9 Mash-up

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Portal 2 Chapter 9 Mash-up
sp_a4_finale1.bsp Finale 1

Chamber number 1.pngChamber number 7.png

Test Chamber Infobox previous.png
Test Chamber Infobox next.png
Test Chamber Infobox Portal Guy.png
Chamber progress 1.pngChamber progress 7.pngChamber progress slash.pngChamber progress 1.pngChamber progress 9.png

Portal 2 Chapter 8 Test Chamber 17.png
Chamber icon cube dispenser on.pngChamber icon cube button on.pngChamber icon cube hazard on.pngChamber icon excursion funnel on.pngChamber icon excursion switch on.png
Chamber icon laser sensor.pngChamber icon laser field on.pngChamber icon faith plate on.pngChamber icon dirty water.pngChamber icon blades hazard.png

This is the fifty-seventh level of the game and the first part of Chapter 9. The level takes place within an Aperture Science decoy Test Chamber and the maintenance areas of the facility, and features the Aerial Faith Plate, Excursion Funnel and Conversion Gel. Crushers are present as the primary hazard in this level.






  • Test Chamber 17 (Wheatley)
  • Wheatley's Trap
  • Aperture Science Facility


  • Get to Wheatley and plug GLaDOS in.


  • Go across the corridor to the decoy chamber.
  • Use the Aerial Faith Plate and wait until you get on solid ground.
  • Fire a portal on the Conversion Gel and the other one on the wall next to the monitors.
  • A drop of Conversion Gel will paint your platform. Shoot either portal under yourself to get to the catwalk. It doesn't matter which, as for instance you use a blue portal above the catwalk and then fire one underneath, the orange one will be moved over.
  • Continue walking along the catwalk.
  • Stop when you get to the end of the catwalk and shoot a portal on platform below the catwalk.
  • Place the other portal on the wall on the right higher above.
  • Jump through the portal on the platform.
  • Walk along the catwalk.
  • Stop when Wheatley uses the Crusher.
  • Put a portal on the wall on the left to the catwalk further away.
  • Go back a few steps and fire a portal on the wall and go through the portal.
  • Run through the Emancipation Grill on the left.

Video walkthrough

Download Download demo file

Related achievement

The Part Where He Kills You
The Part Where He Kills You
This is that part
Pit Boss
Pit Boss
Show that pit who's boss


Main article: Portal 2 soundtrack

The Part Where He Kills You by Aperture Science Psychoacoustics Laboratory [3:23] | Download Download | Play icon.png Play

Fake escape

Near the start of the excursion funnel, there's a girder that looks like a possible escape from Wheatley's clutches. However, not only doesn't it lead to any portalable surface, it doesn't actually exist in the first place: Any object, player included, passes right through it.


  • When portalling the tile in the middle of the conversion gel, the game will always place the opposite colored portal onto the escape route at the same time.

See also