Locking save files? It's about time.
Tired of dumbasses borrowing my games and overwriting my saves.
Disc version is easily worth double what the DLC version costs. It's like buying all 6 versions of Terminator 2 on DVD. Gotta have the best and most complete version.
Well no, they can still overwrite your save, except now you cant do anything about it and will continue from where they left off.