Portal Test Chamber 16 (Bonus)

This is the fourth Bonus map of the game. It is unlocked when the original Test Chamber 16 has been completed.

Hazards

 * Cube Hazard
 * Turrets

Strategy
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Portals

 * Don't use any portals to take out the turrets. Close in on them using the cubes as shields.
 * At the last turret, gather up all the cubes and use them to build steps to get you over the barrier. Jump over with a cube to disable the turret.
 * Two portals are needed to get through the final fence.

Steps
-To do-

Time
-To do- }}