Secret Files: Tunguska is a fantastic adventure with a third-person view in the point and click genre. Nina is thrown out of her daily routine when she discovers that her father has disappeared without a trace. Since the police seem unwilling to help her, Nina goes looking for clues regarding her father's whereabouts. She joins forces with Max Gruber, a young colleague of her father, who impulsively offers to help the attractive young lady. Together they quickly discover that Nina's father participated in a research expedition to Siberia, trying to uncover the causes of the mysterious Tunguska disaster of 1908. In this mysterious event, a powerful explosion caused an inferno that devastated the land of Tunguska. Nina and Max soon realize that her father's disappearance is connected to this event, and their search for answers takes them to the most remote corners of the world — Berlin, Moscow, Cuba, China and Antarctica. Powerful opponents are also interested in the secret of Nina’s father.