Gamers who pre-order Battlefield 3 are assured a copy of the Limited Edition, which includes the Back to Karkand post-launch digital expansion pack at no extra charge. With Back to Karkand, players can wage all-out war on four of the most celebrated maps from Battlefield 2 including Strike at Karkand, Gulf of Oman and the Sharqi Peninsula, all stunningly re-created using the power of Frostbite 2.