A game that that will have you asking yourself, "Wow, what took you so long I.W.?"
But the game doesn't end there. After you get passed the nine plus hours of singleplayer (which has a very high replay value), you discover the other game mode present: multiplayer. If you were drawn into the campaign then you haven't seen anything yet. The number of customizations avaliable to players exceeds any other game I've played. There's things called, "Perks," (over 30) that give your chatacter his own feel and orignality. No matter how you play, whether it be run and gun with a uzi or pick people off with an M14, you can make a character that allows you to experience the game like how YOU would want to, not just how the developers pictured it. The gameplay in the multiplayer is a real treat, mixing elements of games like Battle Field 2 and Ghost Recon into a perfect representation of what modern warfare gameplay is like, while still holding on to the classic feel of old Call of Duty games of late. The multiplayer is very addictive and rewarding, when you rank up you feel like your acomplishing something, an element many games today lack.
When you get passed the first few days of playing Call of Duty 4, you'll see what I mean. Setting aside how realistic and "right" the game feels, it happens to have another important element that doesn't usually go with realistic: the game is FUN to play. You'll enjoy playing the game, rarely will it ever make you frustrated or angry (although it will inevitably happen). Its one of those games that will be in your xbox 360's disc drive for weeks, if not months to come. What I'm saying is you'll get yout money's worth, many times over.