Portal 2 Chapter 2 Test Chamber 1
This is the tenth level of the game, and takes place within a dilapidated Test Chamber. This level introduces the Thermal Discouragement Beam, and the way in which it can be used to activate Panels and thereby grant access to inaccessible areas. This Chamber corresponds with Test Chamber 06 from the original Portal.
Complete the first Thermal Discouragement Beam test
This test is the same test as Test Chamber 06 in Portal 1, which you can see the energy ball launcher and catcher before GLaDOS replaces them with the lasers.