User blog comment:Drkdragonz66/Modern Warfare 3 interview: Robert Bowling talks about Spec Ops Survival/@comment-94.1.140.228-20110813012856/@comment-69.165.162.140-20110818063925

Nothing is ever unique in general. Every idea that people come up with has already been around in some shape or form. In fact, all the FPS take ideas from actual guns, so technically it's not unique.