Portal 2 Chapter 4 Test Chamber 18

This is the twenty-seventh level of the game and the first part of Chapter 4. It is set within a dilapidated Test Chamber, and requires the player to utilise advanced knowledge of the Hard Light Bridge and Thermal Discouragement Beam in order to proceed. This level features both Goo and Turrets as its main hazards.

Mechanics

 * Laser Receptacle
 * Discouragement Redirection Cube
 * Vital Apparatus Vent
 * Hard Light Bridge
 * Grating
 * Glass
 * Light Strip (white, pink)
 * Aerial Faith Plate
 * Panels
 * Pedestal Button

Characters

 * Chell
 * GLaDOS
 * Wheatley

Objective

 * Complete GLaDOS' Test Shaft (Test Chamber 18)

Hazards

 * Goo
 * Thermal Discouragement Beam
 * Turrets

Locations

 * Aperture Science Enrichment Center
 * Test Chamber 18 (GLaDOS)
 * Surprise Room
 * Nanobot Working Area (in-between chambers 18-19)