The Sinking City 2 has optional puzzles, locks, and chests, but if you don't want to miss anything, then you're going to want to know the Storage Room code solution in the basement of the hospital, which is in one of the locked rooms that you don't have to open to make progress in the main campaign. From ammunition and weapon mods to raw materials, we recommend opening this optional secret (especially if you are empty on slots in your inventory).
