I have just started a level, quickly got an achievement I needed. Now can I just quit the level and still have the achievement or do I have to play and complete the level before I gain the achievement?
marked as duplicate by BlueRaja - Danny Pflughoeft, Bora, Sorean, Blem, FAE May 12 '12 at 17:35
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No you don't have to complete the mission, however you do have to be connected online.
No, you just need to meet all requirements for a certain achievement to obtain it.