COD 4 MODERN WARFARE

Call of Duty is a first person shooting game developed by infinity ward and published by Activison for pc ,psp,ps3,ps2,macintosh,etc It was released for the Mac in September 2008, then released for the Wii in November 2009
As opposed to earlier games in the cod, the game features modern equipment and new features, some exclusive to the multiplayer part of the game, such as "killstreaks"; killing a number of enemies without the player dying in between kills allows access to various assets including airstrikes and helicopter support. A character can be positioned in one of three stances: standing, crouching, or prone; each affecting the character's rate of movement, accuracy, and stealth. Using cover helps the player avoid enemy fire or recover health after taking significant damage. As such, there are no armor or health power ups. When the character has taken damage, the edges of the screen glow red and the character's heartbeat increases. If the character stays out of fire, the character can recover. When the character is within the blast radius of a live grenade, a marker indicates the direction of the grenade, helping the player to either flee or toss it back to the enemy.
MULTIPLAYER
Call of Duty 4 features team-based and death match based multiplayer modes on various maps. Each moder has an objective that requires unique strategies to complete. Players can call in uav scans, air strikes, and attack helicopters, when they achieve three-, five-, and seven-enemy kill streaks respectively. A game ends when either a team or player has reached a predefined number of points, or the allotted time expires in which case the team or player with the most points wins. If the points are even when the time expires, Sudden Death mode is activated in which there is no re-spawning and the team who either has the last man standing, or achieves the objective first are the winners. If the player is in either of the two matches, then there is an Overtime match, in which the next team to win is rewarded the victory.