Well, it sounds like the game makers made changes to the games so that they now require they be on the device to work. Meaning they require internal storage to work. This being the case, your only options is to downgrade the game (uninstall the update if possible) and run the older version from the SD card, or change to a system that is running Android "Marshmallow" and see if you can then make the SD card "Internal" rather than "External". But note, you have to start with a blank card to do that.