Call of Duty 4: Modern Warfare is a first-person shooter video game developed by Infinity Ward and published by Activision for Mac OS X, PlayStation 3, Windows, and the Xbox 360. It is the fourth installment of the Call of Duty video game series, excluding expansion packs. The game breaks away from the World War II setting of previous games in the series and is instead set in modern times. The game is the first in the series to be rated Mature in North America. The title and game details were announced on April 25, 2007, and the game was released worldwide between November 6, 2007 and November 9, 2007. It became available on Steam on November 6, 2007 for pre-purchase, and was available to play on November 12, 2007. It was released on September 26, 2008 for Mac OS X. The game was in development for two years. It uses a proprietary game engine, and includes features that include true world-dynamic lightning, HDR lighting effects, dynamics shadows, and depth of field.
The story is centered around a fictional near-future conflict involving the United States, the United Kingdom, and Russia, who are fighting against Russian ultranationalists in civil war torn Russia, and rebels that have staged a coup d'état in a small Middle Eastern country. It is told from the perspectives of a United States Marine and British SAS operative, and is set in multiple locations, including the Middle East, Azerbaijan, Russia, and Prypiat, Ukraine. The multiplayer portion of the game features various game modes, and contains a leveling system that allows the player to unlock additional weapons, weapon attachments, and camouflage schemes as they advance.
Call of Duty 4: Modern Warfare received considerable praise and has won numerous awards from gaming websites, including IGN's "Best Xbox 360 Game." It was the top-selling game worldwide for 2007, reaching over seven million copies as of January 2008.
Call of Duty 4: Modern Warfare is a first-person shooter similar to previous games in the Call of Duty series, but set in the present-day instead of World War II.
The game's move to modern warfare introduces new weapons and technology to the Call of Duty franchise, including the M203 grenade launcher, M4A1 carbine, the AN/PEQ-2 Target Pointer for use in conjunction with night vision goggles, the MP5SD submachine gun, and the FGM-148 Javelin portable anti-tank guided missile. The player gains access to these over the course of the game, but may only carry up to two weapons in addition to grenades. Weapons from fallen foes can be picked up to replace weapons in a player's arsenal. Players also have additional abilities, including a grenade launcher attachment, night-vision goggles, and the ability to call in airstrikes.
The gameplay of Call of Duty 4 shares several features with previous iterations of the franchise. Once again, players fight alongside AI-controlled teammates. They help during the game's missions by providing cover fire, shooting down enemies, and clearing rooms for entry.
A character can be positioned in one of three stances: standing, kneeling, 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 there are no armor or health powerups. 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.