Portal 2 Chapter 1 Test Chamber 1
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Chapter 1 - Test Chamber 01
sp_a1_intro2.bsp 
This is the second level of the game, and introduces the concept of controlling Portals with Switches. This level takes place within a dilapidated Test Chamber, and allows the player to control the location of a Portal using a Switch. Activating and using the Portals in the correct order allows the player to enter the Chamberlock and move deeper into the Facility.
Hazards
- None
Walkthrough
- Jump into the pit and activate the button when prompted; a blue portal will open. Turn around to face the starting ledge to see an orange portal.
- Walk through the orange portal and pick up the Weighted Storage Cube, bring the cube back to the central area.
- Press the button opposite the first button to open a different portal. Take the cube through the orange portal and place it on the Heavy Duty Super Colliding Super Button, then return to the central area.
- Press the remaining button to open another portal. Walk through the orange portal and through the Chamberlock.
Video walkthrough
Music
Main article: Portal 2 soundtrack
Overgrowth by Aperture Science Psychoacoustics Laboratory [2:50] | 
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