There are multiple questions going on here. One has to do with protecting your assets (graphics, music, etc) and the other has to do with protecting access to your game - we don't want people playing who haven't paid for it, right? Let me first discuss assets. The MIS files you found, they might be .pngs, .mp3, etc with a different extension. It is possible that the MIS is only there to throw you off and if you changed the extension to .png and opened it up with paint it would work fine. It