~Doom 2 Level 30 Help. As a number of you are still asking for help on Level 30 of this game, I'd thought I print another variation on how to complete it. At one end of each of the steps/ledges (the big ones) there is a switch. Running from one end to the other, flicking the switch and moving onto the ledge thus lowered allows you to get to the next switch, at the other end of the ledge you are now on. Repeat this until you are on the top ledge. Hit the switch at the top. The pillar that is in front of the bottoom ledge can now be raised/lowered by activating it. Get onto it and as it moves up, fire a rocket at the hole in the skull just before the pillar gets to the very top. You need to hit the hole three or four times, dead on. That does it, you may have a little trouble with the odd monster appearing, in fact this level is bloody hard even when invulnerable, as there are so many monsters after a while that they just keep blowing you off of the pillar on the way up.