One of the first puzzle games I played as a kid. Spent countless hours with a friend completing it, when online walkthroughs weren't a thing.
The Quick Time graphics were great for 1997 and the devs hired a band to record different backround music for every room in the mansion. Both combined created an atmosphere I haven't witnessed in any puzzle/escape game since (there might be a bit of nostalgia involved, though :D).
Still have the original CD and keep it like a treasure.