|Test Chamber 02|
|Name||Test Chamber 02|
This Test Chamber is the third level of the game, and grants the player the ability to use the single-portal version of the Handheld Portal Device, allowing them to create blue portals of their own.
Chapter 1: The Courtesy Call
This is the third level of the game, and introduces the player to the single-Portal variant of the Aperture Science Handheld Portal Device. The level is set in a dilapidated section of the Aperture Science facility, and parts of it are decorated with an elaborate series of murals. Through the use of the Handheld Portal Device and static Portals, the player is able to circumvent a number of obstacles and move deeper into the Facility by way of a Chamberlock. These two Chambers correspond to Test Chambers 02 and 03 from the original Portal.
Chapter 2: The Cold Boot
This is the eleventh level of the game, and takes place within a dilapidated Test Chamber. This chamber introduces the Discouragement Redirection Cube, and the way in which it can be used in combination with the Thermal Discouragement Beam in order to activate Panels. This level also introduces the ability of the Redirect Cube to act as a Weighted Storage Cube and activate Heavy Duty Super-Colliding Super Buttons.