dumbest thing i've ever heard of. you can save your game in multiple slots. whoever 'hacks' your game can save somewhere else, unless they're dicks and save over your game. By posting this, i'm assuming that you expect to have someone hack your game for no reason. Well tell them they're retarded for having nothing else to do but hack a random user created game. Only way this is necessary -at all- is if you're making an MMO, in which case, it comes with that - so there's no point in asking for it.