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DOOM 3 Hints
Where can I go from the Security Checkpoint Junction?
1 of 6: Have you tried the west door?
2 of 6: You can see a Z-sec zombie through it (and can shoot him if you're fast enough), but you can't get through the door.
3 of 6: You'll have to go through the east door into the lavatory.
4 of 6: After finishing off all the monsters in the place, look around for another exit.
5 of 6: There's a ladder in a little SE alcove, so climb up it to get into the ventilation ducts. (NOTE: The alcove doesn't open until all the zombies are dead.)
6 of 6: You'll eventually be able to drop down into Engineering Security (which is the room beyond the jammed west door you saw earlier).
