Half-Life: Blue Shift Hints

How do I get through these two big "North Tunnel" and "South Tunnel" doors?

  • 1 of 8: Not by clicking or banging on them, that's for sure.
  • 2 of 8: Look around carefully. Do you see any other doors?
  • 3 of 8: There's a regular-size door just to the right of the North Tunnel door.
  • 4 of 8: Go through it and look at the control panel.
  • 5 of 8: Try pressing both buttons.
  • 6 of 8: The one for opening the South Tunnel door will work, and you can go back out and through it.
  • 7 of 8: Past it is a small area with crates, a few houndeyes, and a large door that's being propped open by an indestructible crate.
  • 8 of 8: Crouch down and go under that door to get to the first serious move-stuff-and-jump puzzle.