Which Castle is the largest in the world? To Prague! Here they dwelt sovereigns of the Kingdom of Bohemia, Holy Roman emperors and of the Habsburg empire. Today is a destination for numerous tours. Right at the end of one of these, you were locked inside the Castle, unable to be helped from the outside. You'll have to do everything yourself: try and use active items and solve little puzzles and try to escape from the Castle as soon as possible. instructions to play with the MOUSE.