Call Of Duty 4 Modern Warfare

The game breaks away from the World War II setting of previous entries and is instead set in modern times. The game received universal acclaim from critics, with the gameplay and story receiving particular praise, while criticism targeted the failure of the game to substantially innovate the first-person shooter genre. It was the top-selling game worldwide for 2007, selling around seven million copies by January 2008 and almost sixteen million by November 2013.

Using cover helps the player avoid enemy fire or recover health after taking significant damage. 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 the 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. The player takes on the role of various characters during a single-player campaign. As such, the player's perspective changes from one character to another between missions.

Some objectives require that the player arrives at a checkpoint, while other objectives require the player to eliminate enemies in a specified location, stand their ground to defend an objective, or plant explosive charges on an enemy installation. After completing the campaign, a special epilogue mission is unlocked for play. The mission itself has no bearing on the campaign plot and focuses on a SAS squad fighting terrorists that have hijacked an airplane and taken a VIP hostage. The main campaign features 30 collectible pieces of intel that award the player with game cheats and visual filters such as infinite ammunition, cluster grenades, and increased contrast.