Alone in the Dark III Cheats

Goto the kitchen, get the poison by the dumb waiter and the poison from the worksurface. Make poisoned wine, drink it, and hold the <ENTER> key until it returns to the inventory and actions list. Your body points display will show at least -1000.
Repeat this process until the negative sign disappears and you'll have approximately 32,000 body points.
If you get the frying pan beforehand, you can use it at the end of the process to prevent yourself from getting drunk.