Ok. Basically my friends and I are trying to get the achievements for completing chapter 1 of the campaign (local play) mode, as well as the perfect chapter 1. We beat the Old Town map just fine and got 8 achievement points. Then we beat the Treasury (to the best of my knowledge) but only recieved 2 achievement points. Now, we just beat the Wharf map tonight (3 times) and were picked up by the helicopter after destroying the two ammo objectives and accessing the two computers (plus clearing the encampment). However, we have yet to get any achievement points for beating the Wharf. Can anyone explain why we only recieved two points for the Treasury and none at all for the Wharf? Thank you guys very much in advance.