Portal 2 Chapter 7 Enrichment Sphere 4

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Title: Propulsion Intro

This is the forty-second level of the game and the first part of Chapter 7. The level takes place within Aperture Science Enrichment Sphere #4, and introduces Propulsion Gel as well as the way in which it can be used in conjunction with Repulsion Gel. Goo is present as the primary hazard.

Hazards

Walkthrough

  • Fire a portal on the corner of the ceiling. Shoot the other portal on the floor below the Propulsion Gel and go through it.
  • Put the portal from the ceiling to the opposite side of the ramp. Push the Switch.
  • The runway should be now covered in Propulsion Gel. Run along it to reach the other side.
  • Then on the other side, fire a portal on the corner of the ceiling. Turn around and go forwards and fire the portal on the wall on the left and go through the portal.
  • Shoot the portal from the ceiling to the floor under the gel pipe.
  • Push the switch.
  • Use the first runway to get to the other side or use the portal on the floor.
  • Run along the second runway.
  • Fire portals to the right wall and to the left wall. Go through the portal and pick up the cube.
  • Go back and use the portal from behind the glass and put it on the beginning of the second runway. Go through the portal on the wall.
  • Fire the portal at the beginning of the first runway and get the cube on the button.
  • Get to the other side by using the runway.
  • Shoot a portal on the floor on the right. The other portal should be at the beginning at the first runway. Go through the portal on the floor.
  • Go to the end of the runway. Run along the runway and go through the portal. Push the switch.
  • Get to the exit-door and go through it.
  • Go through the Emancipation Grill on the left.
  • Put the portal under the propulsion gel and the other portal on the pillar. Push the Propulsion Gel switch.
  • Wait until the gel has stopped flowing and then place the portals on the ceiling and under the Repulsion Gel. Push the Repulsion Gel switch.
  • Run along the runway to the catwalk. Go to the other side of the pillar and place a portal on the wall. Put the other portal above it. Go through the portal.
  • Go to the other side of the pillar and shoot the portal from below to the wall next to Propulsion Gel. Then go through the portal.
  • Fire the portal from the wall on the pillar and use the runway to go through the portal.
  • Go in the elevator.

Video walkthrough

Download Download demo file

Related achievements

Portrait of a Lady
Portrait of a Lady
Find a hidden portrait

Music

Main article: Portal 2 soundtrack

The Reunion by Aperture Science Psychoacoustics Laboratory [3:45] | Download Download | Play icon.png Play