The game will launch on November 4, and include "battlegrounds of the future, where both technology and tactic have evolved."
Amid rising concern in the U.S. over China's role in cyberattacks, the latter is expanding its focus on virtual combat.
The first new medal out of the Defense Department since the 1944 creation of the Bronze Star recognizes the growing importance of cyberwarfare and drone strikes.
The game's developer says the downloadable content will arrive on January 24 on Xbox Live for players with paid subscriptions to Call of Duty Elite.
The mega hit reached the milestone a day faster than "Avatar" did.
But Modern Warfare 3 was able to take top honors as the most-played shooter game in 2011, says gaming network Raptr.
The new Call of Duty game easily beats the previous five-day record holder: last year's Call of Duty: Black Ops, which pulled in $650 million.
Call of Duty: Modern Warfare 3 has shifted over 6.5 million copies and generated $400 million of revenue in its first 24 hours.
Battlefield 3 and Modern Warfare 3 go head-to-head in CNET's battle of the first-person military shooters. Which one is the better game?
Modern Warfare 3 takes players all across the world in various military campaigns.