Portal Test Chamber 17

This Test Chamber is the eighteenth level of the game, and introduces the player to the Weighted Companion Cube. The Chamber features multiple High Energy Pellets and is home to the second Rattman den.

Mechanics

 * Weighted Companion Cube
 * Vital Apparatus Vent
 * Victory Lift
 * High Energy Pellet (launcher and catcher)
 * Heavy Duty Super-Colliding Super Button (H.D.S.C.S.B)
 * Pedestal Button
 * Door (test chamber)
 * Door (test chamber)

Hazards

 * Getting hit by a High Energy Pellet
 * Getting hit with a cube