| • | 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 |
