Indiana Jones and the Great Circle is just as much an adventure about punching Nazis as it is solving ancient puzzles. After the introductory levels, one of the first puzzles the game presents you that will really test your attention to detail is the Sacred Wounds puzzle while you’re tracking down the Stolen Cat Mummy in the Vatican.

“Secret of Secrets” is a mystery you’ll find as you explore Indiana Jones and the Great Circle ’s Vatican. You’ll be able to find it once you reach the Sistine Chapel. The safe — and all the clues — are located in a small office off the west end of the chapel.