We are not sure whether EA and DICE are in a giving mood with the announcement that Battlefield: Bad Company 2 has sold over 5 million copies across all platforms, which beats the heck out of the original estimates; or whether they simply had this planned all along.  Whatever the case, Battlefield: Bad Company 2 fans are going to get a real treat in the form of a new mode that will be released soon. The new mode is known as Onslaught and it will be a 4-player Co-Op mode.

The Onslaught mode will be available for the following four maps: Atacama Desert, Isla Inocentes, Nelson Bay, and Valparaiso. The maps have been redesigned with some new lighting, vehicles and the time of day during which the map takes place. The Onslaught Co-Op 4 vs. 4 mode will have its own leaderboards to allow you to track the progress of your 4-player squad.

While no official release date has been announced, Onslaught has only been confirmed so far for the Xbox 360 and Playstation 3; but our sources insist that Onslaught will be released for the PC platform as well, but not at the same time that the Xbox 360 and Playstation 3 versions are released. Our sources are confirming that the Onslaught mode add-on from DICE will again be free for players to download.

Of course this is all great, but are they ever going to release Battlefield 1943 for the PC as they promised?