Call of Duty: Modern Warfare: Mobilized features the same first-person shooter gameplay found in its predecessors, Call of Duty 4: Modern Warfare and Call of Duty: World at War. Mobilized includes new weapons and vehicles, new mini-games such as hacking computer terminals, and taking control of UAV spy drones and an AC-130 gunship.
Mobilized also features a six-person online multiplayer mode, including new features of games like Sabotage, where players fight to bring a bomb to opposing bases, also a Survival mode in which players must fend off waves of enemies at once, and Arcade mode, where players must complete the single-player campaign in a set time limit for points and unlockable achievements.
Mobilized has a new interface, improved controls and mobility. The AI was also improved, enemies take cover, they can charge with shotguns, pull back when the player enters the room, throw grenades, etc.
Source: Wikipedia, "Call of Duty: Modern Warfare: Mobilized," available under the CC-BY-SA License.