Engage in a dangerous game of hide and seek with Zombie Hitler. Find extra missiles and plasma ammo in the southern rooms. Finally defeated Zombie Hitler will leave you the iron key, and 3 x poison! Be sure you end up with more than 60% of health (more than 80% if he falls on an existing poison puddle) before taking the iron key! Avoid having him fall on a bomb or a death chalice!

Save the girl in this room. Go east through the secret door.

Continue east through another secret door and reenter the hallway. Enter the cell immediately to the south and open the next secret door. Blow up the barrel and have two armours come at you. Deal with them. Retrace your steps and open the secret door in the plank wall. Take the cross and the death chalice. Continue south.

Open the first of the next two secret doors. Bring down the armour, take the cross, open the second secret door, take the gold key. Don't go through the door, there's a bomb right outside it. Retrace your steps.

Continue.