The player must first use a portal to get a Cube, which is put on a button to create stairs to an elevated platform. This chamber is also a Cube and Button test, and also introduces the player to hazardous goo. The chamber itself is mostly unchanged, however the glass panel Chell lands before exiting the elevator collapses under her weight, and the ceiling of the hall to the elevator has collapsed, forcing Chell to pass through a maintenance area, where a new Ratman den can be accessed.Īs the original chamber was merged with chamber 04, a new test chamber has taken it's place in Portal 2. In Portal 2, the original Test Chamber 05 has been merged with Test Chamber 04. Yet another Cube and Button test, this time the test subject must retrieve two Weighted Storage Cubes, one on a high platform and one in a pit, and put them on two separate buttons.
