Available for a limited time, the Battlefield 3 pre-order offer features the digital expansion pack Battlefield 3: Back to Karkand at no extra charge. This themed multiplayer expansion pack includes four legendary maps from Battlefield 2 boldly re-imagined with Frostbite 2 physics,destruction and visuals. Completing the package are classic Battlefield 2 weapons and vehicles, unique rewards, new achievements/trophies, and more.