Gotham Knights: What is the Biodecryption Key Solution?

Dr. Langstrom, I knew thee well.

by Rob Sperduto


At this point in Gotham Knights you may have had enough of Dr. Langstrom. You’ve already scratched your head over the Langstrom Passcode solution and escaped from the GCPD, and now you’re forced to deal with the dead. This time, however, there are so many more objects to mull over. Allow us to be the detectives for you. Here’s the Biodecryption key solution in Gotham Knights.

How to Solve the ‘Find the Biodecryption Key’ Puzzle in Gotham Knights

The correct objects to connect together are the Blood Vial with the Blood Glucometer. Since the glucometer measures and monitors the level of glucose, it adds up that the Blood Vial is the only proper substance. The rest of the items are just red herrings.

To connect the Blood Sample to the Blood Glucometer, hover over one of the objects and press the Mark button. Then, drag your cursor over to the other object and press the Mark button again. Once connected, press Solve to complete the ‘Find the Biodecryption Key’ Puzzle.

If players attempt to connect other objects together, the solution will fail and they will not be able to proceed from the puzzle. Although some objects technically do connect with one another, they do not fit within the context of the Biodecryption puzzle. So, ignore these combinations entirely.

For reference, the full list of items is as follows:

  • Blood Vial
  • Blood Glucometer
  • Urine Sample
  • Langstrom’s Phone
  • MMO Key Fob
  • Pulse Oximeter
  • Reading Glasses
  • Wallet
  • Medical Bracelet
  • Bloody Clothes
  • Soft Tissue Sample

Don’t be fooled by the Urine Sample, either. It’s the long tube resting on the tray, and although Dr. Langstrom’s diet lacks hydration, you should ignore this object. The correct object to pair with the Blood Glucometer is the Blood Sample, which resides within the vial holder.

Wondering what’s next? Eventually you will be able to fast travel, and unlock multiplayer in Gotham Knights.

Gotham Knights is available on PlayStation 5, Xbox Series X|S, and PC.

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