Portal: Prelude Test Chamber 14 (Advanced)

This is the fourth advanced Test Chamber of the game. This version is unlocked when the original Test Chamber 14 has been completed. It as the extra challenge such as two Turrets impossible to knock down, less white surfaces and a harder ending.

Hazards

 * Turrets
 * High Energy Pellets
 * Cube Hazard

Video walkthough

 * To do