To open a safe, approach it and interact with the dial to start the safe-cracking process. As you get to the correct number, either found on a note or by listening for the slightly higher click ...

Now, Vancouver locksmith Terry Whin-Yates has also gone full MacGyver, showing how to open a Sentry-brand safe with a magnet and a sock.

The safe doesn't have every number listed, instead using Roman numerals on certain spots. The four and five are in the bottom right corner, just before the six at the button of the dial.