Bad Company 2 Unlockables Achievements Complete each achievement to receive the allotted gamerscore. Unlockable How to Unlock New Shiny Gun (15) Campaign: find 5 collectable weapons It sucks to be right. (50) Campaign: finish Airborne on Hard P.S. Invasion cancelled, sir. (30) Campaign: finish Airborne Save me some cheerleaders. (15) Campaign: finish Zero Dark Thirty…