Cracking the Father and Son safe code in Indiana Jones and the Great Circle presents players with one of the game’s more intricate puzzles, a challenge that emerges shortly after rescuing Giuliana in the mission titled A Nun in Trouble. This puzzle, set within the Vatican, requires keen observation and analytical skills to decipher the code hidden within the safe.
How to get the Father and Son safe code
(Image credit: MachineGames)
After assisting Gina in her quest to save Giuliana, she provides you with a key that unlocks a secret room within Borgia Tower—the very location of your earlier rescue. You may have noticed this door previously, as it required a whip to swing across a gap. If you missed it, retrace your steps down the tower until you locate the gap suitable for your whip, leading to a door on the opposite side.
Utilizing Giuliana’s key, you can unlock this door, which opens to the outside and leads to another door that grants access to the Agency Room housing the elusive safe. To simplify your task, the safe code is 5873. Input this sequence on the dial to unveil the contents and unravel the Father and Son mystery. For those curious about the process behind this code, further details follow.
(Image credit: MachineGames)
Within the Agency Room, players will discover two desk drawers. One contains an Italian poem aptly titled ‘Father and Son’, featuring a series of circled letters, while the other drawer holds a Polybius Square Diagram—a grid where pairs of letters correspond to specific numbers. The task at hand is to take each pair of circled letters in order and input them into the grid to derive the four safe code numbers. This process unfolds as follows:
- I and R – 5
- I and A – 8
- T and A – 7
- S and A – 3
(Image credit: MachineGames)
However, a keen observer might question, “Hold on a minute! S and A doesn’t make 3, it makes 9?” Indeed, you are correct. The last combination is inexplicably incorrect, despite the accuracy of all preceding pairs. The reason behind this anomaly remains a mystery, potentially shedding light on the challenges players face when attempting to solve this puzzle. Regardless, inputting the aforementioned code will successfully unlock the safe, allowing players to continue their adventure.
