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Deus Ex: Human Revolution Hints
Secondary: Find and speak with Sarif.
1 of 14: After using the elevator, go down the hallway to find some double doors, then crouch down before opening them.
2 of 14: Go through them and take cover next to the machinery on the left, then watch for a good time to cover-jump across the room to some more machinery.
3 of 14: Edge over to its right side, then crouch-run for the small crawlspace you can see ahead and a bit to the right.
4 of 14: At the other end of the crawlspace, enter cover mode against the machine to the left, then cover-jump over to the next machine.
5 of 14: However, don't try to cover-jump to the third machine, or you'll almost certainly be spotted. Instead, leave cover mode and run along the right wall to reach the next crawlway space.
6 of 14: Past it, turn left and crouch-run through the blasted-open door, then turn right and look for a broken bit of railing.
7 of 14: Drop through it, then go around the nearest machine to find another small crawlway.
8 of 14: At its other end, go into cover mode against the machine on the left, then watch around the corner for two run-around zombies. One is back a ways, and the other runs by going left and right.
9 of 14: Wait until the other one runs by going left, then leave cover mode and go to the right if the farther-away zombie isn't facing you.
10 of 14: Stay right as you go, then turn right and get behind a huge vertical pipe as soon as you can.
11 of 14: Watch for the left-and-right zombie to run over and twitch near a bundle of white pipe segments, then go over there and hit him with a takedown move.
12 of 14: Go back to the blue pipe, then go past the small pool of boiling water and through the doorway in the corner.
13 of 14: Just past the doorway is a white pipe bundle. Hop onto it, then hop onto the machine so you can open the vent shaft's cover and hop into it.
14 of 14: The vent shaft will take you to Sarif's room. Talk to him to finish the objective, then figure out how to get back to the elevator.