Like its predecessors, Modern Warfare 3 is a first-person shooter video game. It will run at 60 frames per second, minimum.Activision confirmed , that Modern Warfare 3 on the PC will have dedicated servers support.
The player assumes the role of various characters during the single-player campaign, changing perspectives throughout the progression of the story. Each level is a mission that features a series of objectives that are displayed on the heads up display, which marks the direction and distance towards and from such objectives. Damage to the player is shown by blood shown on the screen. The player's health regenerates as time passes. Tasks vary in their requirements, having the player arrive at a particular checkpoint, eliminate enemies in a specified location, stand their ground to defend an objective, or plant explosive charges on an enemy installation. The player will be accompanied by troops who cannot be issued orders.
Infinity Ward and Sledgehammer Games have revealed that Modern Warfare 3 will feature a new Survival Mode. Survival Mode features one to two players fighting endless waves of enemies with each wave getting more difficult. Despite being much compared to the World at War Nazi Zombies mode, enemies do not spawn at fixed locations like the zombies do, but instead, at tactical positions based on the current location of the player. The mode will be available on all multiplayer maps in the game and in the mode, players can earn "cash" for items such as weapons, upgrades and ammo.