its not a stand alone game, it in part over writes fallout 4 and when I uninstalled and reinstalled my fallout 4 my saves were corrupted. i tried to make a separate folder for a copy of fallout 4 for London only but some how it still corrupted both folders. I don't blame the devs, Bethesda fucked up fallout 4 and they had to make it this way I'm sure. but I'm too angry to play it now.
