GameSpot UK has teamed up with Deep Silver to give you the chance to win one of ten copies of The Secret Files: Tunguska (PC), and one lucky winner will also take home an iPod Nano! The adventure game follows the travels of Nina, who is trying to find out what happened to her father during a voyage to the Tunguska region of Siberia.

To enter, you must be aged 16 or over, a UK resident, and answer the question on the left correctly.