There are already millions of people playing Modern Warfare 3 online, Activision's Call of Duty: Elite developer Beachhead has said.
In a message relating to Call of Duty: Elite server capacity, Beachhead studio head Chacko Sonny said: "We are proud to say that Call of Duty: Modern Warfare 3 has launched and millions of people are already playing online.
"Registration requests for our new live service Call of Duty Elite are exceeding even our most optimistic expectations, which is creating a bottleneck and some players have not been able to register.
"We have already registered hundreds of thousands of players and we are working around the clock to increase our capacity as quickly as possible."
Sonny also assured players that gameplay data is safe.
"Please be assured your gameplay data is safe and that whenever you successfully register for Call of Duty Elite, all of your data will be waiting for you," explained Sonny. "So enjoy the game, start ranking up and we assure you we are working around the clock to accommodate every player who wants to be a part of Call of Duty Elite as quickly as possible. We will update you frequently to keep you informed."
If you're a little rusty on what's happened so far in the Modern Warfare franchise, check out our comprehensive story so far feature.
Those of you wanting to know our verdict, should click straight onto our Call of Duty: Modern Warfare 3 review.