Let's say you want to drum up some interest for the Xbox version of a beloved RPG series that has traditionally appeared on the Playstation. What would you do? Why, use Twitter, of course! The Xbox.com Final Fantasy XIII page is holding a social media event of sorts, offering Xbox Live members the chance to win "a secret Xbox Live prize." The gist of it is pretty simple, register at the Xbox.com Final Fantasy XIII page (US or UK), then post a tweet that contains the #FFXIIIXBOX hash tag and the URL of said Xbox.com page. Once a certain number of tweets has been reached, the prize will be unlocked. There is no indication of what the prize may be, but we're hoping for some outlandish spiky hair for our Avatar. Barring that, we'd settle for a giant sword or some bizarrely effeminate accessories.