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Portal 2 Hints
Turret Assembly Line
1 of 7: Approach the door at the end of the hallway to get it to partly open.
2 of 7: Past the door, move onto the metal walkway to get Wheatley to appear, then go over to where he stops. Wait for all the lights to go out, then wait some more for him to turn his flashlight on.
3 of 7: Follow him and the light along until you come to an area with a bunch of junked turrets on an unmoving conveyor belt.
4 of 7: Move along the walkway until you come to a large gap, then keep moving forward to drop down to the lower walkway section without falling off of it. Go up to the top of it, where you'll have to drop down onto a moving conveyor belt.
5 of 7: Past a small drop, move carefully along the rail-less walkway until you come to a small gap in it. Jump the gap, then move on to where Wheatley says to portal up to a passage.