Portal 2 Chapter 7 Enrichment Sphere 4
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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.
- Propulsion Gel
- Repulsion Gel
- Weighted Storage Cube
- Pedestal Button
- Heavy Duty Super-Colliding Super Button
- Test Chambers 01 & 02
- Sphere 04
- Observation Room (at chamber 01)
- Go through Old Aperture's Test Track.
- 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.
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