We just found out that a single-player demo for Tom Clancy’s Rainbow Six: Vegas is now available on the Xbox Live Marketplace. The download is 478MB big and features a hostage situation in Dante's Casino. You and two other ops will have to infiltrate and take out the terrorists who are preparing to execute the hostages in front of a camera. Tom Clancy’s Rainbow Six: Vegas is the fifth iteration of the multimillion-selling Rainbow Six tactical shooter franchise, developed by Ubisoft’s Montreal studio for Xbox 360, PSP and PS3. Rainbow operatives take to the chaotic streets of Las Vegas as an escalating terrorist siege in “Sin City” threatens to take world terrorism to new, uncontrollable heights. The future of global security hangs in the balance as you battle to defend classic Vegas locations and environments like Fremont Street, the Strip and casinos. Rainbow Six Vegas will be released on November 17th in the UK.