Dying Light 2: Treasure Hunt Side Quest Walkthrough

thegamer.com:

In Dying Light 2, you play as Aiden, a Pilgrim who came to Villedor looking for his missing sister. Pilgrims know their way around areas with infected and act as the "couriers" of Dying Light's world. That's why Aiden is more than willing to help anyone asking for help which is what Meyer does once you get access to The Peace Keeper's central HQ in north Wharf.

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One of the errands you can do for Meyer is "The Deserter," a side quest where you will need to find a missing Peace Keeper. Depending on your choices during that quest, you will be able to start "Treasure Hunt," another side quest where you will need to decipher an old code and find the Peace Keepers hidden loot.

You will need to fulfill the following requirements before being able to start Treasure Hunt:

If you kept the map after completing "The Deserter," "Treasure Hunt" will start immediately.

During "The Deserter," you will receive an encrypted note with the location of a Peace Keepers' hidden loot. The note has a substitution cipher that replaces each original letter with a different letter from another alphabet, such as A = aaaaa and B=aaaab and so on. Your job is to find the second alphabet to understand what is written on the note.

To do so, go to the Peace Keeper's central HQ Library and talk to Albert near the bookshelves. He will mention a book that can help you with the note; it will be lying on the table inside the library. Read the book and then the note to start unscrambling the message. Decrypting can take a long time, so here's what the note says:

Muddy Grounds

Water Tower Basement

Zero Three Two One Six Seven (3-21-67)

Now that you know the hidden loot's location, go to the Water Tower in