CoD4

def from wikipedia
Gameplay
Call of Duty 4: Modern Warfare will introduce a variety of game play styles into the single player campaign completely new to the Call of Duty series. The game moves away from the standard three country-specific campaign style, and allows the plot to play through more like a film style plot with interlaced story lines from the perspective of the player as a member of the US 1st Force Recon and a member of the British 22nd SAS Regiment. There is also a variety of cameo-style missions where you play as various other soldiers such as an AC-130 Spectre Gunship gunner, or as one part of a two man sniper team behind enemy lines in a flashback style mission.

Call of Duty 4: Modern Warfare will focus on the variation of modern warfare as an infantry soldier by allowing the player to control soldiers in a vast amount of different scenarios, straying away from the constant "at eleven" action of previous Call of Duty titles and allowing for both heavy intensity fire fights and slower paced drama styled intensity. The developer, Infinity Ward, has so far told about a handful of such levels including where the player will be the gunner of an AC-130 gunship and the pilot of a AH-1 Super Cobra helicopter providing air support.

The series' move to modern warfare has also introduced a variety of new modern weapons and technology to be introduced to the Call of Duty franchise. Such showcased weapons and attachments include M203 grenade launchers, IR laser pointers for use in conjunction with night vision goggles, silenced MP5SD submachine guns, and the FGM-148 Javelin portable anti-tank guided missile among many others.

Plot
A Russian nationalist by the name of Anton Volkov is set on returning his homeland to the Soviet times. Volkov knows the United States would never allow this to happen, thus he funds a coup in the Middle East, organized by his ally Al-Asad, to draw attention away from Russia. The two men and their seconds-in-command gain the nickname The Four Horsemen. However, the British and US governments have been monitoring Volkov's activities and discover his real intentions. The story is told from a perspective of a British 22nd SAS Regiment operative in Russia and American 1st Force Recon in the Middle East.

The game also features a flashback mission set 15 years ago in the Chernobyl Zone of Alienation, which features a new incarnation of Captain Price from 22nd SAS Regiment, the only character to appear in both of the first two games of the Call of Duty series. He needs to assassinate Volkov, but his mission fails because his Captain gets wounded and he has to get out him of the Zone of Alienation. Whether this new Price will be confirmed to be a relative of the WWII era Price remains to be seen. It is also believed that the assasination attempt left Volkov with only one arm.

Multiplayer
For multiplayer, it has been confirmed that Call of Duty 4 will include a class system which has five preset classes with default weapon load outs and perks assigned to them as well as allows users to create five custom classes where the user can customize their weapon load out and three perks to assign to their soldier. The five default classes include Assault, Spec Ops, Light Machine Gunner, Demolitions, and Sniper class. Create a class will be unlocked when the user gains enough Experience Points (XP), earned by killing his/her opponent, and becomes a Private (level 4), and will increase rank with more XP earned. XP will also vary depending on the type of match the user is playing. Only two of the classes are available to a first time player; the rest are unlocked as the player gains more experience online and gains higher rank. The highest known level as of now is level 65.[5], which unlocks Prestige mode. You'll be able to save and name your custom classes for quick access in multiplayer matches. Most of the new weapons and perks that you can use to outfit your custom class will be unlocked as you gain experience ranks, but there are also a separate number of challenges associated with each weapon that will subsequently open up new add-on gear as you complete them.