Bottom-line, Call of Duty 4 delivers. It is the very pinnacle of first-person shooters. Unlike another mega-popular first person shooter franchise, Call of Duty 4 keeps the redundancy and repetition to a bare minimum through the single-player campaign. It does so by making you perform a variety of different tasks throughout most of the missions, and thus creates an exceptionally diverse single-player element that few, or even, no FPS game has done before. Call of Duty 4 combines a superb visual package with unparalleled audio for an experience that will surely not be toppled for quite some time. And while its single-player can last a paltry six hours, the multiplayer will have you going for a long, long time. At this point, the only FPS game that can possibly stand toe-to-toe with Call of Duty 4 is Sony's Killzone 2, but that one's still got some time before seeing light. Call of Duty 4 is brilliant. Go get it.