Portal 2 Chapter 9 Holmes Vs Moriarty

This is the fifty-eighth level of the game, and takes place within the maintenance areas of the Aperture Science facility. This level features the Aerial Faith Plate, Excursion Funnel and Repulsion Gel, and Turrets and Crushers are present as the primary hazards.

Hazards

 * Falling to your death
 * Turrets
 * Goo
 * Shredder
 * Crushers

Test Chamber 75
One of the many test chambers Wheatley had constructed in an attempt to capture Chell and GLaDOS after she had escaped his death trap. When Wheatley figured out where the two are headed, he simply moves this test chamber towards their path, destroying the bridge, leaving the only place to go is to go inside the very chamber.

Upon entering, Chell is greeted by eight Defective Turrets. This was not intended as he had thought the turrets he deployed were the functional ones, but at first he thinks the turrets are killing Chell. When he realizes that Chell was not hit by a single bullet, he begins deploying the regular turrets outside the test chamber.

On the panel with the test chamber number, (numbered '75' for some reason) the normal test icons are all replaced by the same picture of turrets shooting at the little stick person.

"Silently killing you." - Wheatley voiceover in chamber 75