This page contains ZombiU Hints for Wii U called "Raven Door Code" and has been posted or updated on Feb 25, 2013 by champ37043. Let us know what you think of this Hint by thumbs voting.
Raven Door Code
For the Raven door code in the warehouse when you are going for the second book, you first need to complete the Tower of London mission. Then, you can find parts of the code spread out in the bunker. The first is in the mirror by the door, the others are found by scanning with the blacklight in the room - follow the blood trails to get them.
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