Improved AI - AI is more challenging than ever.Explore all new Vegas hot spots as the environment changes from dusk to bright daylight to dawn, creating a visual experience that is as challenging as it is breathtaking. More Vegas - Sin City is back and bigger than before.Ubisoft Montreal Returns - Rainbow Six Vegas 2 is back in the hands of Ubisoft's Montreal studio, creators of the award-winning and highly acclaimed Rainbow Six Vegas, to ensure that ending to the Vegas story is one you'll never forget.Recipient of numerous awards, including 2006 Best First Person Shooter and Best Online Game, Tom Clancy's Rainbow Six Vegas 2 pushes the top-selling franchise to new heights with new gameplay features. The best are back and this time winner takes all. Tom Clancy's Rainbow Six Vegas 2 is your last chance to rescue America's sexiest city from an escalating terrorist siege that will force you into heart-pounding action from beginning to end. Tom Clancy's Rainbow Six® Vegas 2 - the sequel to the award-winning next-generation first-person shooter - returns to Sin City.