Ah yes, the level 11.
First, take a walk around and shoot down all the shotgun guys or heavy weapon dudes. Watch out for cacodemons, but there's no need to pay atention to imps or hell knights. Just keep moving and they won't hit you. Once you're reasonably safe, head for the bridge. Watch out - there are 2 or so arachnotrons upstairs. Once you're done, approach the room above (the one with vertical metal bars). But be careful - once you enter it, a box with archville opens up. He can't leave the room, so all you really have to do is to grab the keycard and get out.
The red keycard opens the door near start of the level (down, past the acid pool). There are some demons and lost souls inside, and Baron of Hell ready to shoot your back. At the end you'll find a switch. Press it, then go back to the circle. (Look closely for switches which will lover sections of circle for you). You should be able to access the block in the middle now, and - more importantly - a wall blocking bridge just opposite will lower. There's a bridge above pool of acid, with cacodemons and lost souls on both sides. Take them out carefully.
You'll come to a big room full of monsters, including nasty Pain Elemental. A good place for plasma riffle, or your trusty Super Shotgun if you're feeling cocky. Once you clear the room, you should see a lift down. Jump down there, take out the arachnotron. There are lifts on both sides. Take both lifts up and press both switches. The exit should be open now.
Of course, I didn't list secret passages here, but you just wanted to finish the level, right ?
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[Last edited by b0rsuk at 08-07-2005 05:08 PM]