Finished the single player story on hard 100% complete...all assignments and collectibles complete, all weapons found and unlock..
Just Rehash and Resign..load up game and resume story and 37/42 achievement will pop..Best if you do it offline.This is my save that i posted on here LOAD "N" POP....ENJOY.....DON't FORGET TO HIT THE THANKS OR LIKE BUTTON......
LINK:http://www.mediafire.com/?v6ypakib2dkwkbh