If we are thinking about the name 'Battlefield' the first game that comes into our mind that was firstly released is going to be Battlefield 1942 in 2002. But Codename Eagle was the 'spiritual predecessor' of the Battlefield series. That's where it all started.
The franchise sold over 17 million units and that only until 2008. Now with the great Battlefield 3 game released the number of units sold grew.
Battlefield 3 with it's FrostEngine 2 technology sold in over 5 million copies and that only in it's first week. Now that's a big game!
The franchise tends to become bigger than Medal of Honor (with it's unnespected bad game released in 2010) and it is threatening the Call of Duty series.
I am sure many of you after finishing Battlefield 3 were wondering when the next one is going to be released. But expect a surprise about Battlefield 4!