Portal 2 Chapter 4 Test Chamber 20
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Chapter 4 - Test Chamber 20
sp_a2_triple_laser.bsp 
This is the thirtieth level of the game, and is the first level to be set within a fully-repaired and functional Aperture Science Test Chamber. This level requires the player to combine precise Portal-placement and multiple Thermal Discouragement Beams in order to proceed.
Hazards
Walkthrough
Video walkthrough
Music
Main article: Portal 2 soundtrack
Triple Laser Phase by Aperture Science Psychoacoustics Laboratory [4:15] | 
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Play
Gallery
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