Secret Files: Tunguska is a single player, point-and-click adventure for Nintendo DS and DSi in which players investigate one of the great real-life scientific mysteries of the 20th century, the obliteration of the Siberian region of Tunguska.

Playing as fictional heroine Nina Kalenkow, players utilize Nintendo touch screen controls, as well as additional search options to uncover clues and combinable items in an expansive gameworld that features more than 100 highly detailed locations and scrollable backgrounds across both screens.