Level up 4 unique classes to unlock over 65 weapons, multiple skills, and killstreaks, to customize your loadout. Play the campaign for a fully voiced, action-packed story, or create a custom quickmatch to let off some steam. Try the challenges to truly put your skills to the test.
Update June 1st, 2012:
Thanks for the feedback! We've released a huge update that fixes many bugs, balances some levels, and makes some killstreaks, skills, and weapons both unlock quicker and cheaper! Click the 'v1.1' in the main menu to find out more!