The recent blog, Peace in the Era of Call of Duty really made me think about war games that dig deeper than simply a kill streak reward. The first game that came to mind was Spec-Ops: The Line and although I haven’t played it, I began to wonder if it did the war genre as...
Shoot everything at least once. That's how you earn the big bucks.
Clearing waves gives you bonuses, so try and kill everyone within the time limit.
Shoot barrels when bad guys are near them for quick explosive kills.