There used to be a feature where you can create an account, that way, if you buy a new PC, You could sign in and have all of your saves. But during beta tests, (NOT the public betas) The feature would not save the passcodes, or usernames. When we redesigned the whole game, The feature worked, But would always reset the tester's progress, Bring up the sign up page, Or the Sign up with Game jolt/google/apple function would not work (We never got to activate the Sign up with Apple/ Google feature) Meaning, we could not continue with the Account idea. But that is where Save Codes come in. Now, If you must Reinstall the game, You just type in the save code!