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?
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?
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.