In Indiana Jones and the Great Circle , the Hidden Gate puzzle in Northern Sukhothai challenges players to unlock a secret passage. As Indy searches for the Blessed Pearl, he must solve the Khmer’s Hidden Gate puzzle. Players need to find cogwheels in the area, activate the mechanism, and open the doorway for Indy and Gina to enter the Hidden Pyramid.
Where to find the hidden gate
The puzzle is in Northern Sukhothai and is part of The Blessed Pearl main adventure. Here, you can also collect three of the ten cogwheels needed for the Khmer Gear Puzzle.

Step-by-Step Solution
- Go behind the Left Gear Train and yank off the plug with your whip to start the mechanism. Grab the cogwheel there.

- Place the cogwheels in the correct order to start the Left Gear Train. Once the gears stop, remove the small cogwheels for later use.

- Do the same for the Right Gear Train—arrange the cogwheels correctly, start the mechanism, and retrieve the small cogwheels after the gears stop.

- Interact with the gate to open it and proceed.