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DOOM 3 Hints
Once I'm past that, how do I finish the level?
1 of 9: Go through the door in the small office on the other side of the chasm, then move down the hallway to get to the Personnel Transfer Station.
2 of 9: On its lower floor, there are three big red doors that lead to a lift.
3 of 9: Open the doors by using the control panel to the right of the middle door (the door that says "Shaft 2" on it).
4 of 9: When you do, a fairly large monster attack will be provoked. To handle it easily, find the secret little crouch-only area near the stairs that leads you behind some crates to where some armor shards and spare rockets are hidden. If you don't peek out too far from that area, you can shoot all the monsters as they run around without them being able to return fire.
5 of 9: After that's over with, use the lift's panel to summon it up to your level.
6 of 9: It's just your luck that you'd catch a hellknight just coming off his shift in the cavern below. Have your soulcube, BFG, or whatever ready to blast him with the moment the lift arrives.
7 of 9: Get in it and take it down to find that there's still more to this cursed long level! (At least this is the last big, long, complicated level in the game.)
8 of 9: Find the door that leads to B2 Material Transfer Lift, then use its wrecky bridge to get to the other side. (Note that you're now at the bottom of the chasm that you used the crane to cross earlier.)
9 of 9: Go through another door to finally find the lift that will take you to Caverns Area 2.