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DOOM 3 Hints

Can I get into the Security Checkpoint control area?

  • 1 of 4: Once you get into the Departure Lounge, you can find a locked door leading to the checkpoint's control room.
  • 2 of 4: However, it requires a certain ACO access card to open.
  • 3 of 4: Unfortunately, that card is nowhere to be found.
  • 4 of 4: This is one of several locked doors that you can never open. I won't have a question for every one, but you can always check the Map when you come across a locked door to see if it's marked on the map (with a red line). If not, then forget about it.