Has the desire for hats, hats, delicious TF2 hats diminished over the last few years, or is the public's interest in digital head-adornment as strong as ever? I ask because Valve and Irrational are adding BioShock clobber to Team Fortress 2, and- hey, don't all load up the game at once. You'll need to buy BioShock Infinite's season pass on Steam to gain access to it, which I believe comes with a few pieces of downloadable content in addition to a very small selection of hats. Full details here .