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  1. Games
  2. Action Games
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Cipher Machine code in Indiana Jones and the Great Circle explained

Guides
By Will Sawyer last updated 14 April 2025

Solving the Kummetz cipher puzzle in the Officer Lounge is the only way reach the ship’s bridge in the Great Circle

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Indiana Jones and the Great Circle cipher machine code puzzle Indy holding a code wheel with letters on it
(Image credit: Bethesda)
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The Indiana Jones and the Great Circle cipher machine code puzzle is found in the battleship in Kummetz, where you have to combine the Captain's Code and a bunch of esoteric code tables to try and draw a solution to a complicated puzzle.

As mandatory puzzles in Indiana Jones and the Great Circle go, this is probably one of the more complex brain-teasers, but it's not impossible to solve this enigma and crack the code accordingly. If you want a hand, here's everything you need to know about solving the Cipher Machine Code puzzle in Indiana Jones and the Great Circle, and making your way into the heart of the mountain battleship.

Indiana Jones cipher machine code explained

Indiana Jones and the Great Circle cipher machine code puzzle captain's code clipboard JOGM

(Image credit: Bethesda)
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The answer to the Cipher Machine puzzle is 3666, and below we'll take you through the steps in Indiana Jones and the Great Circle that lead you to that conclusion, if you want to do it yourself.

Article continues below
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Upon entering the Officer Lounge, you’ll easily find all the components you need to solve this puzzle: The Captain’s Code, two Code Lists, the cipher machine, and four code wheels covered in letters, none of which are inside the machine where they should be. Therefore, your first job is getting the cipher machine ready, and then you can work on breaking the code on this enigma – just don’t do what I did in Indiana Jones and the Great Circle and think you need to manually solve everything using the code tables, as it’s much simpler!

Here’s what you need to do:

  1. Using the Captain’s Code, JÖGM, examine the code wheels for these letters and place them into the cipher machine in this order. The wheel with a ‘J’ on it goes in the leftmost slot, then the wheel with the ‘Ö’ goes in the next slot, and so on.

Indiana Jones and the Great Circle cipher machine code puzzle Indy placing code wheel into enigma machine

(Image credit: Bethesda)
  1. Close the lid on the cipher machine and rotate the wheels to spell out JÖGM in the top row with the white triangles pointing next to each letter. With that, the bottom row of letters spells out “BLUT”.

Indiana Jones and the Great Circle cipher machine code puzzle Indy entering the captain's code to get the BLUT code needed for the code table

(Image credit: Bethesda)
  1. Examine the Code Table on the table behind you and you’ll find that the four-digit code for BLUT is 3666.
  2. Head over to the exit door and enter the code. The door will swing open, and you’ll be able to climb up the ladder to reach the battleship’s bridge.

With that, you’ve completed the Kummetz cipher machine puzzle and are practically at the end of the Himalayas level, ready to embark on the next stage of Indy’s adventure. Remember the above steps as there’s another one of these cipher machine puzzles in the next main region.

This is only a small part of Indy’s globetrotting journey, so be sure to read our Indiana Jones and the Great Circle review to find out what we think of the whole adventure.

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Guides Editor, GamesRadar+

Will Sawyer is a Guides Editor at GamesRadar+ with over five years of experience in writing online guides, news, and features, and has a BA (Hons) in Journalism. Starting as a freelancer, Will contributed to startmenu and Game Rant before joining the GamesRadar+ team in August 2021. Since then, he has written hundreds of guides about a huge range of games, with shooters and action games being his areas of expertise. Outside of writing about games, Will hops between multiplayer shooters with friends, such as Darktide and Helldivers 2, and delves into whatever has been on his backlog for far too long. He also tries to get through his never-ending Warhammer pile of shame of grey Tyranids, Aeldari, and Chaos Space Marines.

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