Portal 2 Chapter 2 Test Chamber 1
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This chamber introduces the Thermal Discouragement Beam to the player.
Chapter 2 - Test Chamber 01
sp_a2_laser_intro.bsp 
Hazards
Walkthrough
Proceed to the Victory Lift. Whilst standing on it, shoot a portal on the floor where the Thermal Discouragement Beam makes contact and place the other portal on the ceiling above the receptacle. The Victory Lift will proceed to rise up, from which you can reach the exit door.
Video walkthrough
Related achievements
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Undiscouraged Complete the first Thermal Discouragement Beam test |