Adh level 11

Go to this room. Find plasma gun ammo. Defeat the armour by the secret doors. Don't go south from this room, a bomb blocks the passage.

Enter the library. Switch between the revolver and the axe for the guards and the ghosts. Get the health chalices.

Find a cross in this secret area (and a 1-up behind the next secret door)...

...and find a cross...

...in this room...

...in this room...

...and in this room. Fight the guards in this room for the cross and three gold chalices.

Collect these death chalices, one at a time, and get the brass key here.

Continue.