This is the forum for helping you out if you're stuck or if you want to discuss the nitty gritty details of the dungeons within Mount Grimrock. Warning: forum contains spoilers!
Last step for me tonight before bed, so far a true blast missed a few things tough, iam on level ?, in a part with "maze of madness" too tired to figure it out tonight i guess, for those looking for the start: when you enter the room left wall in between 2 teleport field there is an hidden switch on the wall. hope it help
Since you helped me with that little tip let me help you! Press that hidden switch you mention first! Solve the puzzle, at the place with the key, there is another hidden switch that leads to the other side of the room: Item: Spirit Mirror Amulet (25% More Exp)