Portal: Prelude Test Chamber 17 (Advanced)

This is the fifth advanced Test Chamber of the game. This version is unlocked when the original Test Chamber 17 has been completed. It as the extra challenge such as a harder beginning, the High Energy Pellet now angled, more Turrets including two impossible to knock down, less white surfaces and the Weighted Storage Cube replaced with a spherical replacement.

Hazards

 * Turrets
 * Goo
 * High Energy Pellets
 * Cube Hazard
 * Crushing