Trecision, 1995
One of the best mystery games ever released, the game casts you in the role of Tom Scool, a private investigator, who's been hired by a stone collector to steal a rare gem called "Vesnu" from the mountain chalet of a recluse actress. But, the actress gets killed by one of her guest and you decide to solve the murder case yourself, as the police can't reach the crime scene in time due to a heavy snowstorm. You interrogate every character in order to find clues, collect items and use them as and when they are needed.
The plot and graphics are top-notch, as are the atmosphere and interface. The characters are both colorful and interesting and the story, believable and engaging. From start to finish this game never fails to please.