I have beat the campaign on legendary and all of the missions are gone? All i have is the noble start one.
How do I get them back? Please Help.
The best advice, that I have found, is to simply replay through the game again to unlock the levels. This has happened to one of my friends as well. You can replay them on any difficulty to get them back.
On a sort of related note, did it give you your achievements prior to this incident?