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Deus Ex: Human Revolution Hints
Is there a way to get this door's security code?
1 of 5: It's on a nearby pocket secretary, but it's a lot of trouble to get to.
2 of 5: You'd have to go farther down the main hallway, setting off two mines and jumping over a white pipe bundle.
3 of 5: If you keep right as you go, and turn right and crouch down after jumping over the pipe bundle, you'll survive the mines plus stay out of sight of all the zombies that come running. (Unless you're playing on a high difficulty setting, in which case the mines will kill you.)
4 of 5: After the zombies return to their original locations, pick up the pocket secretary that's next to one of the dead bodies.
5 of 5: Read it in the media logs menu to learn that the door's code is 9823.