This game is great, and should be bought by every first person shooter fan. So where should I start....The single player! Most First person shooters don't have good single player campaigns but Call of Duty 4 has one of the best, even though it is fairly short and you can not play Co-op. The story is great and will keep you engaged in exciting moments the whole time. The single player is only a very small part of call of duty 4, however. The multiplayer is where most of the excitement of the game is at. It seems like the multiplayer never gets old. It just keeps having me coming back for more. One of the best features is the prestige mode, which is where you pretty much start over, but get a new symbol next to your name, that adds a lot of replayability to the game. Also there are a lot of different game modes that you can play. Theres standard team deathmatch, free for all, Search and Destroy, which is one of my favorites, headquarters, and flag based domination. You can also play in private matches with friends which adds a lot of customization and fun. Call of Duty 4 is one of the best games that I have ever played and that I will play, I've played for months and months and it has never gotten old. I would highly suggest everyone to go pick up this great title