I quit out of a campaign mission as soon as it started, and whenever I click resume, the game fails to load the mission and it gives me like 80 missions completed all at once causing the achievements for complete x missions or multiplayer games to pop. Yesterday I got the 150 achievement naturally, and today after trying to resume the mission twice (I had only played like 3 games today before it) I got the complete 200, 250, and 300 missions achievements. Clearly there was something wrong which caused the stat to get messed up. I don’t know what could have caused this. As soon as I realized what was happening I restarted the game, and now the mission fails to load but doesn’t cause the missions completed stat to bug out. I fixed this by just manually selecting the mission I wanted to play.