OK, I've gone through all the suggestions regarding this issue and come to the conclusion that I've got a disc that needs replacing for Forza 4. Sending the disc for replacement seems to be out of the question as the game isn't on the list of available
games. If I manage to buy a 2nd hand copy of the game will I be able to retrieve my game history ( cars I've built, achievements, etc)? Will I need to buy a new copy of the game? - Can I get my stuff back with a new copy? Cheers!