Portal 2 Chapter 2 Test Chamber 4

This is the thirteenth level of the game, and takes place within a dilapidated Test Chamber. This level continues to use the Thermal Discouragement Beam as its primary mechanic, and demonstrates the way in which interrupting the Discouragement Beam can be used to the player's advantage. The Test Chamber also introduces the Unstationary Scaffold, and Goo is present as the primary environmental hazard.

Hazards

 * Goo
 * Thermal Discouragement Beam