Indiana Jones and The Great Circle: Secret of Secrets Mystery Guide

The Secret of Secrets Mystery in Indiana Jones and The Great Circle can be found in the marble halls of the southwest corner of the Vatican City level. If you’re stuck figuring out how to open the locked safe by looking to the stars and the saints, we can help. Below you’ll find the Secret of Secrets Mystery solution in simple steps.

Indiana Jones and The Great Circle Collector's Edition

Release Date: December 9, 2024

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Secret of Secrets Mystery guide

We’ll walk you through the steps to solve the Secret of Secrets Mystery below, so if you’re just after the safe code, scroll down to the end.

Inside the room with the safe, you’ll find Nicoletti’s Letter suggesting you look to the stars and the saints, using Peter with the key first, then Paul with the sword. In addition, you’ll also find a planetary Chart listing icons alongside a series of increasing numbers outward from the sun.

Also in the room are two statues of saints. Pick up Peter (the statue with the key) first and rotate him to view the symbols carved on the bottom. Make a note of these symbols. Then do the same with the statue of Paul, making a note of the symbols there as well. Note that you’re holding the statues upside down, so the order and direction of the symbols is reversed.

You then need to refer to the planetary chart to find the numbers you’re after. You’ll see that the symbol shown on Peter’s statue is missing, which must mean that number is the one smudged out next to 4. For Paul’s, bear in mind that the statue is upside down when pairing the numbers, and that the numbers on the map increase from one to eight, even if all haven’t been written.

Finally, you’ll learn Secret of Secrets Mystery safe code. Our code was: 4471.

Enter the code into the safe to solve the Secret of Secrets Mystery in Indiana Jones and The Great Circle and you’ll be rewarded with… a worthless forged book? Ah, but underneath is a hidden note worth a handsome sum of Adventure Points and an upgrade book to spend them on.

With the Secret of Secrets secured, you can solve further puzzles in the Vatican by following our Bulls of Blood and House of Gold Mystery guides.