you were walking around the infected city, there wasn't much around except boarded up buildings, places with rusty locks, blue locks, red locks, some had key cards. While walking you heard a gun nearby go off

Where are you Jack!? I know your there! Wait... This smell is different, who's there!?

You heard the person that practically started all this, Ropo.EXE, you need to hide quickly but where? You remember that you were given a device that lets you go through walls