Indiana Jones and the Great Circle Secret of Secrets Solution

Indiana Jones and the Great Circle is brimming with unique mysteries both big and small, and each has unique rewards players won't want to miss out on. You might find your way near the Sistine Chapel just by exploring or while looking to photograph inscriptions for Antonio, but either way it'll take a little deduction to make it inside the locked safe. There are multiple clues that piece together the combination, and you can net both Adventure Points and a new book to upgrade your skills in Indiana Jones and the Great Circle.

Secret of Secrets Mystery Solution

If you haven't seen its magnificence in person just yet, make a point of traveling to the Sistine Chapel. Even Indiana Jones and the Great Circle's recreation of this iconic artwork is stunning to behold, but there are other secrets hiding nearby. When you first reach the Borgia Courtyards, look on the far wall for a small staircase that goes down one level.

After entering this area, look to the right to find a door which the Clerical Key will unlock. Once through the door, climb up the stairs and you'll spot a few different things in this office area. You can continue out the next door and see the Sistine Chapel for yourself, but be sure not to leave the area before tackling the Secret of Secrets mystery.

Secret of Secrets Safe Combination

There's no doubt your endgame here is to open the safe, but four different clues have to come together to do that. First, check the desk near the safe and open the drawer to discover a critically important Planetary Chart. Collect this to begin the Secret of Secrets mystery, but you'll need to reference it as well.

Next, there's a different desk directly across from the safe that's turned perpinducular to the safe and against that wall. Be sure to collect Nicoletti's Letter from on top of that desk, and you'll learn that the safe holds "an original copy" of the "Secretum Secretorum."

The letter also says, "If you've forgotten the combination again, look to the stars and the saints: Peter with the key, then Paul with the sword." The Saint Paul statuette is next to the safe, and the Saint Peter statue is in the diagonal corner from where the safe is located on a small endtable.

Both of them can be picked up and rotated, and when doing so you'll discover markings on the bottom of each statue. These correspond to specific numbers based on the Planetary Chart seen earlier.

The safe combination is 4-4-7-1. The symbol on Saint Peter is the one that isn't visible on the Planetary chart, and the Saint Paul markings have to be read as if you turned it upside down so the symbols are facing the correct direction. Once the combination is entered, you can pop open the safe and seize your rewards.

First, read the hidden note and collect it to finish this mystery. You'll always need more Adventure Points for Indiana Jones and the Great Circle, and Secret of Secrets nets you 100 Adventure Points. The safe also holds the Adventure Book Cutman I, and spending 250 Adventure Points to unlock it will improve your health bar regeneration efficiency, so it's extremely valuable before you wade into some of the game's most difficult combat scenarios.