@MI2
Then you will need to contact the games publishers for a replacement disc!
BTW, now I have never tried this on a game disc but if you scratch off all the gold foil part from a 'Pioneer CDR' it will still read and write!! And thats 'All' the foil!! I once scratched one of these pioneer discs and it still worked so as an experiment I scratched it all off just to see how much of it could actually be removed!