Battlefield 3 will feature a fully fledged singleplayer campaign, which will span from Iraq/Iran, to Paris, France, and to New York City as well.
The first portion of the campaign is set on the border of Iran/Iraq, and has the player assuming the role of Sgt. Black, who is part of a Marine unit that is tasked on a mission to investigate possible insurgents, when your squad comes under fire. Here’s the first 12 minutes of the campaign in Battlefield 3: