The Bioshock series and Team Fortress 2 are easily some of today’s most popular games. Well, gear up for some crossover fun! Irrational Games and Valve have teamed up to create some Bioshock-themed items. One item which will offer crit protection will be a version of the Little Sister’s Big Daddy pocket doll. Other items include masks and hats for the Bioshock fan in all of us. These items will, however, only be made available to Bioshock Infinite Season Pass holders on Steam.