Portal: Still Alive Test Chamber 12 (Bonus)

This test chamber is the twelfth bonus level of the game. It is taken from Portal: The Flash Version MapPack. The challenges of this level are unlocked when the test chamber is completed once.

Hazards

 * Electricity Field
 * Laser Field
 * Turrets

Walkthrough

 * Go trough the first door.
 * To your right will be a turret. Portal behind it and knock it down.
 * Quickly after that portal over to the upper ledge and behind the other turret.
 * Knock it down.
 * Option 1: Place one portal onto the upper portion of the wall and the other one on a wall that is in your reach. Jump over the ledge and grab the cube.
 * Option 2: Do the same thing. Jump from the smalles ledge and mid-air place a portal on the floor and hold CTRL to crouch. Grab the cube.


 * Place the cube on one floor and portal to the Victory Lift.
 * Redirect the cube with portals to land on the upper Heavy Duty Super-Colliding Super Button.
 * Put a portal next to the ledge with the other cube.
 * Jump of the lift and place a portal under you.
 * Grab the cube and place it on the other button.
 * Portal up to the ledge where the door is and go trough the door.
 * Go to the door that will just slightly open.
 * Place a portal trough the small hole.
 * Quickly portal behind the Turret on your right.
 * Knock the turret down.
 * Drop down and knock down the turret with portals.
 * Quickly portal to the farthest turret and knock it down.
 * Option 1: Put a portal parallel to the Electricity Field. Wait for the right time and jump then walk across it.
 * Option 2: Portal peek instead of walking.


 * Portal up to the ledge, avoiding the Laser Field.
 * Put one portal in the room with the Skull Cube.
 * Go all the way back to the hallway next to the button.
 * Place another portal and grab the Skull Cube.
 * Bring it to the Button.
 * Place a portal parallel to the Chamberlock door.
 * Jump trough another portal and proceed to the Chamberlock to finish the chamber.