• New Pointstreak system that rewards players both for landing kills and completing objectives
• Weapons proficiency system that allows you to customize your favorite weapons, making them more effiecent in any map or mode
• Online/offline 2-player co-op Special Ops Survival mode that earns you experience through 16 frantic objective-based missions
• New play modes, including: Kill Confirmed mode, Team Defender mode and user generated match modes
• Integration with 'Call of Duty: Elite,' an online multiplayer oriented service launched simultaneously with Call of Duty: Modern Warfare 3

Weapon Proficiencies
Just like your player, weapons now rank up, unlocking additional attachments, reticules, camos and the new proficiency category. Weapon Proficiencies not only allow you to get better with weapons, they also allow you customize your weapons with helpful attributes such as "Kick" for reduced recoil, "Impact" for deeper penetration through hard surfaces and much more. Many proficiencies are specific to their weapons class. And all are geared towards enhancing a certain play style and can allow for efficient use of your favorite weapons in maps and game modes in which they might not otherwise be the best choice.

Modes and Match Customization
Along with the return of the fan favorites Call of Duty: Modern Warfare 3 introduces several new game modes. Collect dog tags from killed players, including those on your squad while you prevent the opposing squad from taking yours in Kill Confirmed mode. In Team Defender mode, grab the flag and protect the flag carrier for as long as you can to increase your team's score. In addition players will enjoy user generated match mode functionality which allows you to configure any mode how you want it and then share these over the Call of Duty: Elite online service.

2-player Co-op Special Ops Survival Mode
Special Ops cooperative action returns with a bevy of additions, including 16 new objective-based missions and the all-new Survival Mode. Team up online, locally, or play solo and face endless waves of attacking enemies throughout every multiplayer map. Purchase and customize your weapons, air support, equipment and abilities to stand up against increasingly difficult forces and land a spot on the leaderboards. Earn experience and rank up with the newly implemented progression system. The higher the rank, the more weapons, air support, and gear armories you will have available to customize so you can change your tactics on the fly. In addition to the action packed battle for freedom, the cooperative Survival Mode also serves as an effective training tool for competitive multiplayer action.

Call of Duty: Elite
Call of Duty: Elite is an online multiplayer oriented service launched simultaneously with Call of Duty: Modern Warfare 3. The service offers both free and subscription based levels of access and is dedicated to the game franchise, featuring lifetime statistics across multiple games, social-networking options, competitions, a mobile app, Facebook integration and more