DOOM 3 Hints

How can I get through the north door in the Manifest Control Entrance?

  • 1 of 6: Try it to see if it'll take your security clearance.
  • 2 of 6: It turns out that this door wants something more like an actual key -- specifically, an ACO keycard.
  • 3 of 6: Fortunately, it's nearby.
  • 4 of 6: You'll find the ACO keycard in the small room just east of the Manifest Control Entrance.
  • 5 of 6: It's setting about halfway down the workspace on the left.
  • 6 of 6: Return with it to the locked door and click on its computer panel to open it.