When i play a game for example Modern Warfare 2 in my campaign i have completed the first 6 missons on veteran ( I've replayed a couple to be sure.) When i go to my achievements for that game it says i don't have them. Also when i do unlock new achievements it gives the notification for earning it, but when i go to see what i earned and how it isn't there, still locked. I am pretty upset because i've completed at least 20+ achievements for MW2, also this happens on a few other games like black ops, just the only difference is when i unlock new achievements i get them. But i've completed the story on veteran and haven't gotten my achievements. Any help would be appreciated. Thanks.