Map Legend
1.Test Chamber 04 Start Point
2.Test Chamber 04 End Point
3.Test Chamber 05 Start Point
4.Test Chamber 05 End Point
Walk past the red button after emerging from the elevator. You see a Vital Apparatus Vent suspended over a pit right ahead of you. Go there.
There’s Weighted Storage Cube down in the pit, so hop into it, place a blue portal on the wall in front of you, and take the cube through it. You emerge through the orange portal that’s adjacent to the button you passed on your way to the pit.
Place the cube on the button and proceed through the exit at the far end of the chamber. You’ve just solved Test Chamber 04.
Test Chamber 05
Stroll down the hall into Test Chamber 05’s main room. You see two buttons on the ground and two elevated platforms: one with a Weighted Storage Cube on it, and another with a orange portal on the wall behind it. Create a blue portal anywhere that’s accessible, and walk through it onto the orange portal’s elevated platform. You emerge facing the platform with the cube on it.
Fire a blue portal at the wall behind the cube-bearing platform. Walk through, pick up the cube, and drop down to the ground. Place the cube on one of the buttons.
Drop into the pit that’s directly opposite the sealed exit to this room. Fire a blue portal on a wall of your choosing, grab the cube that’s in the pit, run back through your portal and off the elevated platform, and depress the second button. Proceed to the next room.
You notice an orange portal above the glass ceiling in this room. To reach it, place a blue portal anywhere you wish. Run through it, and you’re done.