Get medieval on this by typing the following codes during the game:
mpkfa God Mode
mppos Global position
mpfps Frames per second
Or, if you're not much of a cheat, here are a few hints...
ò There are two signs which signal that you are about to enter a boss's lair. Firstly, the teleporter usually has a mosaic on the floor nearby, so if you see one make sure your health is up before you go through. Secondly, an on-screen message says: "Time to Get Medieval."
ò Don't stand in the corner of the screen when opening a chest. If a thief hits you and disappears out of view, you are unlikely to catch him. Ultimately, the best defence against thieves is a tightly grouped party.
ò Skeleton keys are timed power-ups, so don't pick them up until the path to the door is clear; they also open chests.