Strange problem. All the achievements for the Los Muertos unlocked (all dosiers,etc) but I just finished up with the Volt but nothing unlocked at all. Does anyone out there know what might be the problem, and better yet how do I fix it? Lately the game freezes up as it goes to the screen for my campaign to load, so I turn it off then back on, and sometimes it takes several tries before it loads all the way. Could this be contributing to the problem with my achievements not unlocking? Any and all help would be appreciated. Thanks!