Okay. So back in 2010, I bought the game, played through campaign on legendary (freaking hard, you know what I'm talking about). I've been playing matchmaking and all with friends, and I just got an achievement. So I'm looking through my achievements and notice it says I haven't beaten the game yet. On any difficulty. Which I know is wrong. The game refuses to accept I've played through Mission 6 at ALL, on ANY difficulty. Which makes you wonder why the game let me move on to the next level if I haven't beat this one yet....
I've tried playing it again from mission start, going to the level before and letting the game bring me there itself so I can beat it. I've played through it at least 5 times on legendary, by myself, and I absolutely am sick of flying in a saber and blowing up the cruiser. I've done everything I can think of. I really just want credit for beating the game on legendary, which I feel I deserve, obviously, since I spent so many hours doing it, and now again trying to fix it.
Any body know what I should do? Please and thank you!
[Edited on 11.10.2011 9:55 PM PST]