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Indiana Jones and the Great Circletruly has mysteries around every corner, including the literal “mystery” side quests found throughout each level.
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One of the mysteries that took us way too long to crack was the Father and Son mystery in The Vatican, which revolves around solving a puzzle invoving a Polybius square.
Find the Poem and Polybius Diagram
This mystery can only be discovered after completing the A Nun In Trouble discovery mission, so verify to complete it before moving forward with this quest.
In the tower from the end of the A Nun In Trouble mission, you’ll find a door in the upper levels that leads to a balcony, which in turn has another door revealing a secret hideaway full of notes and treasures.
Open the desk drawer to find the Italian Poem, and then find the Polybius Square Diagram on a nearby surface.
Crack the Code
There are eight letters circled on the Italian Poem (in this order):I, R, I, A, T, A, S, O. Split the letters into pairs of two (IR, IA, TA, SO), then use the grid on the Polybius Square Diagram to determine the corresponding number for each pair (where the row and column of each letter intersect).
The final code should come out to:5873. Input this onto the lock of the safe to unlock it, revealing a collection of incognito pictures taken of Indiana and his colleagues while visiting the Vatican.
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Indiana Jones and the Great Circle
Uncover one of history’s greatest mysteries in Indiana Jones and the Great Circle™, a first-person, single-player adventure set between the events ofRaiders of the Lost ArkandThe Last Crusade. The year is 1937, sinister forces are scouring the globe for the secret to an ancient power known as the Great Circle, and only one person can stop them - Indiana Jones. You’ll become the legendary archaeologist in this cinematic action-adventure game from MachineGames, the award winning studio behind the recent Wolfenstein series, and executive produced by Hall of Fame game designer Todd Howard.
