Portal: Still Alive Test Chamber 13 (Bonus)

This test chamber is the thirteenth 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
 * Cube Hazard
 * High Energy Pellets
 * Goo
 * Turrets

Walkthrough

 * By using the portal gun, place one of the portals on the X mark that's above the Turret and the other portal onto the walls or the flood that is portalable (has to be within your reach).
 * Fall onto the Sentry Turret by going through the portals and knock it down.
 * Get back on the floor, avoiding the turret that is behind the Light Bridge's bullets.
 * Shoot a portal trough the Light Bridge and go inside the room where the cube dispenser is.
 * Grab the previously dropped Cube.
 * Leave the room and portal over to the higher ledge where the X was.
 * Stand on the Piston platform while holding the cube and block the shot bullets of the Turret with the cube that you are holding.
 * Go to the Pedestal Button and press it. The button will activate an Energy Pellet dispenser that will knock down the turret.
 * Using the cube, redirect the Energy Pellet into the catcher.
 * After you have redirected the pellet to the catcher, while crouching, crawl into the small hole what was used to transport the pellet to you (with the cube).
 * Drop down into the pit and place the cube onto the Button.
 * Drop down even deeper and quickly avoid the Turret.
 * Kill the turret.
 * With portals, go back and grab the cube from the button and place it on the other button seen in the same room with Goo.
 * In the way, over the goo, by the corner, portal onto the sinking platform and bring the cube with you.
 * Wait for the right time and jump onto the platform.
 * Drop the cube and portal onto a ledge.
 * Grab the cube back and quickly jump trough the portal previously placed.
 * Drop the cube and crouch behind it. This will keep you safe from the Turret.
 * Place a portal behind the turret and, avoiding the turret's bullets, knock it down.
 * Peek over and portal onto the other sinking platform (with the cube).
 * Quickly jump onto the ledge and knock the turret down.
 * Peek over and portal onto the other sinking platform (with the cube).
 * Quickly jump onto the ledge.
 * Wait for the Unstationary Scaffold to arrive.
 * Jump onto the platform.
 * While riding the [Unstationary Scaffold|Scaffold]], use the cube as a shield against the turret's fire.
 * Optional: Portal over to the turrets and knock them down.


 * Put the portal that will help you reach the upper ledge (do not go into them yet!).
 * Press the Pedestal Button.
 * Quickly place a portal trough the door before it closes.
 * Proceed to the Chamberlock/Elevator to finish the chamber.