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The Orange Box: Portal Hints
Chamber 16 with Least Portals
1 of 19: This one can be done with only 2 portals, but you'll have to deal with most of the turrets without portaling in behind them or dropping cubes onto them from above.
2 of 19: In the first room, pick up the turret and throw it so that it'll fall over and deactivate.
3 of 19: For the next turret, take cover in one of the two side areas past the doorway.
4 of 19: After the turret stops searching for you, quickly run down the hallway and get behind it.
5 of 19: Knock it over (or just leave it), then quickly run past the alcove that the third turret is in.
6 of 19: With the two hallway turrets that are facing each other, you'll need to use the two nearby storage cubes.
7 of 19: Grab a cube, run around the corner, and push it into the nearest hallway turret to knock it over.
8 of 19: Immediately turn around and crouch so that your cube will protect you from the other hallway turret's fire.
9 of 19: Crouch-walk your way toward that turret, keeping your cube shield firmly in place.
10 of 19: When you're about to pass the glass wall on the left, stand up and run forward so you can toss the cube at the hallway turret to knock it over, then retreat before a turret in the nearby room can target you.
11 of 19: Go back and get your other cube, then go over to the glass wall and crouch-walk your way toward the next two turrets so you can knock them over without getting shot up.
12 of 19: In the room with the big button, first take out the nearest turret by tossing a cube at it. You should be able to do this and retreat without getting killed.
13 of 19: Grab a cube from the nearby storage room and go throw it at the turret that's near the big red button. This is another thing that'll get you shot up, but you should be able to get away and stay alive.
14 of 19: Now it'll be easy to crouch-walk up to the last turret in the room with a cube held out in front of you.
15 of 19: After that turret's knocked over, put any cube on the room's big red button, then back quickly away from the open door.
16 of 19: Crouch-walk carefully over to the open door's left side until you can see the doorway in the wall past it.
17 of 19: Fire a blue portal through that doorway so that it forms on a wall in the final room.
18 of 19: Then go put an orange portal on any wall or floor nearby and go through it.
19 of 19: Pick up the turret you see in front of you and carry it with you to the exit elevator. (It'll be disintegrated by the force field and make a funny noise.)
