Portal/Escape 01
With nothing of interest in the side room, you must advance forward. As you are about to cross the pistons, if you turn around, you’ll see that a few pistons have silently come down, blocking you from returning that direction. Ominous... You must continue on, only to have the floor opened beneath you.
Turret ambush
![](http://cdn.wikimg.net/en/strategywiki/images/thumb/7/77/Portal_Escape_01_bacontree.jpg/300px-Portal_Escape_01_bacontree.jpg)
The pistons separate, causing you to fall down into an area with limited cover. The door on the right will open first, revealing a turret, followed by the middle door, and the left door, both with turrets as well.
You will have to take out each turret quickly — knock it over or throw it through a portal. It may help to portal yourself beside or behind each turret.
![](http://cdn.wikimg.net/en/strategywiki/images/thumb/3/34/Portal_Escape_01_exit.jpg/300px-Portal_Escape_01_exit.jpg)
The third door will have an exit. Shoot through the opening and proceed to the next room containing a glass pipe. There are a few turrets, but they seem to be malfunctioning, as they may mysteriously talk, but will not shoot. Shoot a portal above the pipe to walk on it, and jump from the pipe to the catwalk.
Fling
![](http://cdn.wikimg.net/en/strategywiki/images/thumb/0/0d/Portal_Escape_01_fling.jpg/300px-Portal_Escape_01_fling.jpg)
Shortly after jumping down with the following live turret, a door should open in front where there is a broken catwalk. Walk forward to the "over here" text, turn around and shoot a portal on the opened door. Enter a ground portal, and fling yourself to the catwalk.
Rocket turret
![](http://cdn.wikimg.net/en/strategywiki/images/thumb/b/b1/Portal_Escape_01_rocket.jpg/300px-Portal_Escape_01_rocket.jpg)
You are back in the observation area, with an emancipation field to your left. Walk through it and press the button — this deploys a rocket turret which will seek you and fire a rocket, shattering the glass window.
Walk behind the turret to the next glass window. The turret will fire a rocket, but quickly dodge after it makes the locked on sound, and it will hit the window. Go through the corridor to reach yet another glass window; here you will need to place a portal on the opposite wall, and a portal within the turret's room. Trick the turret into firing a rocket at the wall.
In the next room, you should see a glass tube for moving storage crates. Redirect a final rocket to this tube and grab a storage cube that falls out. Place the cube in front of the vent and climb into it. Alternatively, a chair from the previous room works.
![](http://cdn.wikimg.net/en/strategywiki/images/thumb/3/3e/Portal_Escape_01_vent.jpg/300px-Portal_Escape_01_vent.jpg)
At the end of the vent is a fan; while you can't climb down, you can shoot a portal, and then backtrack to go in another you can reach, to bring you into a small sewage area. Shoot a portal on the wall above the metal platform and walk across it.
Note: Although you can redirect a rocket to itself, it is immune to its own attacks.