One of the best online experiences you will ever have!
Very addicting multiplayer
Lag can be an issue at times
Campaign doesn't have much replayability
The fourth installment of the Call of Duty franchise takes place in the modern time, opting to leave the World War II battlefield for the first time in the franchise's history. It is safe to say that this was a very good move on Infinity Ward's part, since it is one of the most highly-praised games in recent years.
The campaign follows the previous Call of Duty formula, where you take on the role of multiple soldiers fighting different battles. There isn't much depth to the campaign story-wise, and it is quite short, but it is still a decent experience. There is even a little bonus after the end credits.
CoD 4's multiplayer is what makes this game great, as it is nothing like we've ever seen before. Since CoD games were all previously in WWII, we could not see what modern combat would be like in Call of Duty, until now. Infinity Ward did an excellent job with the modern weapons and attachments.
One new feature to the CoD experience are perks. Perks are almost like bonuses you get for your weapon or player. For example, the Juggernaut perk increases your health, while the Bandolier perk allows you to start with more ammo than you normally would. Perks allow more customization to fit your playing style.
Also new to CoD 4 are killstreaks. These are bonuses you get for getting a certain amount of kills without dying. 3 kills gets you a UAV radar that shows where your enemies are on the minimap, 5 kills gets you an airstrike to be placed anywhere on the map, and 7 kills gets you an attack helicopter, which rains death upon your enemies.
Another new feature is Prestige Mode. When you reach the max level in the game (55), you have the option to enter Prestige Mode. By entering Prestige Mode, you give up all your weapons, perks and attachments, get reset to level 1, and get a nifty emblem where your rank used to be. There are ten levels of Prestige in the game, and they definitely help add to the game's replayability.
Call of Duty 4 is without a doubt one of the best multiplayer games I have ever played. The campaign is decent at best, but the excellent multiplayer makes up for it.