Pre-order Battlefield 3 to receive 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. Players anxious to start the fight can pre-order the Battlefield 3 Limited Edition now.

Source http://www.ea.com/au/battlefield3