Hub 1: Guardian of Steel

Walkthrough
First visit

You appear in a small room with two flights of stairs going to your right and left, each leading to a corner-room with a bull-head switch, whose purpose I will explain later. When you’ll have cleared all this section of monsters, the center pillar of each of those rooms (this whole level is quite symmetrical so no matter which way you go, you’ll wind up in the central room all the same...) is in fact a door that will let you into the other part of that room (note: you can easily kill all of the monsters there by just crushing them under this door-pillar that goes down really fast :-) ). Now you should have before you a big flight of stairs runing upwards (and on your side another flight going downwards just into a small room with some monsters and goodies. The big flight, however, will take you to the central room that has in each corner such a flight of stairs (the remaining two will become accessible later) and also two big doors. One of them (the one on the side where the stairs can’t be accessed) needs the steel key, but the other one can be opened. Go through it, it will take you down into a small steel labyrinth. There you have basically two ways, one of which is always barred. Now we get back to the switches in the first rooms I mentioned earlier. Pulling them moves that wall that’s standing in your way, so you can eventually get into both corridors (there should be also a way to make the wall move completely away, thus letting you into the cage that’s between the two corridors but I haven’t figured out how to get there...). Anyway, at both ends of both of them corridors you will find a switch that you should pull. You should also find your second weapon there (if you didn’t already get it in the Seven Portals as you do when playing on lower difficulties). Time to get back to the Seven Portals...

Second Visit

This one’s going to be very easy, as you appeared in the western part of the Guardian of Steel, perfectly symmetrical with the eastern one. So again, go through the stairs up to the room with the door-pillar (you will notice that this time, it requires the steel key to open), then through the other long stairs back to the central room and through the steel key door you saw earlier on. There again, a lift will take you down to two corridors. Go through the one that is accessible and pull the switch at its end. Then head back to the door-pillar rooms and toy a bit with the bull-head switches there, so as to move the steel bar from the corridor it was blocking to the one you already went through. Then head back to the central room and through the steel key door down and through the other corridor to yet another switch. Having pulled this one, everything that needed to be is done and you can merrilly head back to the Seven Portals for the grand finale...