In the Dead of Night (1994)

In this game you are private investigator Tom Scool. You have been hired by a dishonest jewel collector to sneak into a famous actress' chalet, posing as the double of well-known thriller writer Eric Wells, and to steal her precious gem "Vesnú". But the actress was killed by one of her guests and because of snowstorm you have to wait for police and try to solve this murder case by yourself. Every character has their own personality and you have to find their weakest places, talking to all of them and collecting the items which are available for your inventory.