Sherlock Holmes and John Watson arrive at a Scottish castle to help locate a long-lost family treasure. They soon find out that many things are not what they appear to be. To play this 3D advent calendar, you first assemble a large model of the castle in which the story is set. Over the course of 24 days you find mysterious objects and clues that help you find out about the treasure. Each solved puzzle brings you another step closer to the solution of the puzzle.

We may earn a small commission when you buy through these links.