Koller’s dungeon safe


There is a safe inside Koller's dungeon located in the gas room and it has a password.

Where do I find the password for that safe?

Best Answer

It looks like the location of the code for the safe is on a pocket secretary in the sewers under Prague's Davny district.

The actual code is:

5555. Found from this page under the Prague section.

This guide says that the safe is also hackable for those who have level 3 security access, or they can also use a multi-tool found earlier. The guide say that:

in the small medical cooler to the left of his [Koller's] operating chair you'll find a free Multi-Tool just waiting for you to snag.