Mike Nelson: ''After playing the first four levels of Battlefield 3's single-player campaign it looks like I should temper my expectations and dismount the hype train. There's no denying how fantastic the Frostbite 2.0-powered visuals appear, but that's only one facet of this shooter: I'm interested in how the game's Artificial Intelligence performs under the heat of battle. Will the enemies have the IQ to flank my position, or will they charge headlong into my bullets? What happens if I play devil's advocate and ignore the objectives, how will my squad mates perform? These were the important A.I. behavioral questions I wanted to answer during a recent look at Battlefield 3's campaign. ''