Call of Duty 4: Modern Warfare is a pretty standard military FPS game, and thanks to the solid controls, it does play remarkably well. There are some irritations, however, such as the aforementioned issues with the ADS aiming, as well as some problems locating enemies who are firing at you, particularly while moving at high speeds in a vehicle. Enemy A.I. is also questionable, as they have a tendency to hold their ground and not pursue you, regardless of circumstances. There is a 12-level single-player campaign mode which has three difficulty levels and should take most gamers anywhere from four to six hours, give or take. On top of that, there are both single and multi-card multiplayer modes, with the latter offering FPS staples like death-match and capture the flag. It lacks the depth of Metroid Prime Hunters and as a result, probably won't hold most gamers interest for quite as long as the Nintendo offering.