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Firing Squad

The test chamber is lined with turrets. The only thing between you and these turrets is a wall of glass. Your goal is to make it to the exit on the other side of the firing squad. GLHF.

***WARNING: SPOILERS AHEAD***

Are you having trouble completing this chamber? Here's a cheat sheet to help you through it!

Q: How do I get to the other side?
A: The general idea is to destroy all the turrets and use the launcher thing to launch yourself to the other side!

Q: How do I get rid of the bottom row of turrets?
A: Push the button that's in front of the pressure plate. This will open a secret door leading into a tunnel. Your answer is in the tunnel.

Q: How to I get rid of the middle row of turrets?
A: If you haven't figured this out, then I feel bad for you, but all you have to do is stand on the pressure plate in front of you. The turrets have a line of sight on you if you stand in the middle so the best strategy is to crouch walk hugging the left wall, and then moving slightly to the right until you press the button.

Q: How do I get rid of the top row of turrets?
A: There's a button right above the entrance. It's not hard to press it, it just takes a little more effort than pressing a button on the ground.

Q: I keep on getting shot while trying to push the button that opens the secret tunnel!
A: It's impossible to not get shot. You're just gonna have to risk it!

Q: I'm in the tunnel and I'm perplexed as to which pathway to take?
A: Don't be lazy. Try all of the pathways. Trial and error your way through.

Q: I've taken out the bottom row of turrets, but I'm not too sure how to get out of the tunnel.
A: Just before the area where you find the companion cube, there's a wall on the left (if you're facing away from the tunnel entrance) that you can put a portal on. Place a portal there next time before you advance any further. After you activate the pressure plate, there's a wall to your right (if you're facing the pressure plate) that you can put a portal on. Place your other portal there and walk through. Now, you can get out of the tunnel.

Q: How you I get rid of those laser fields?
A: Right in front of the first row of turrets, in the corner, there is an elevator. Stand on the elevator, and it will take you up to a small room with a button in it. Press that button to disable the laser fields.

Q: How do I open the exit door?
A: Use the button in the corner of the room.

Q: You lied to me! the button just traps me in!
A: On the ceiling tile above the exit door, is a surface where you can fire a portal. On the wall adjacent to the button is another portalable surface. Fire your portals in these two areas. Press the button, and then escape through the portal.