Within the Trauma Center of the Talos 1 Lobby, you'll find an office for Hendrick Devries, and a safe within.
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The code for this safe is 7324. You can find this code in the quarantine area of the Trauma Center, although you'll have to face a tough enemy in order to clear it out.
Prey (2017) Devries Safe Code - GameRevolutionWATCH GALLERY