Portal Test Chamber 15 (Advanced)

This is the third advanced chamber of the game. This version is unlocked when the original Test Chamber 15 has been completed. It has the extra challenge of making the flings harder, one more Material Emancipation Grill in the first pellet puzzle, different ricocheting for the second pellet puzzle, faster moving Unstationary Scaffolding, and trickier button presses.

Hazards

 * Pellet hazard.
 * Goo