Achievements are only applied if you are online when you earn them.
You can go back to a saved game that was made while you were online but any missions started while you were offline would have to be restarted to get achievements from them.
Achievements are only applied if you are online when you earn them.
You can go back to a saved game that was made while you were online but any missions started while you were offline would have to be restarted to get achievements from them.