Valve has announced that if you pre-order Left 4 Dead 2 on PC you will gain access to Bill's hat in Team Fortress 2. "For the first time in history, two separate Valve universes collide.

Valve has announced that hat-hungry Team Fortress 2 ... code can now don this fall's hottest TF2 fashion accessory--the green beret made famous by Bill in Left 4 Dead. "And lest you think this ...

it was also revealed that Oculus Rift owners would get a unique TF2 hat (a popular in-game item type). Today the TF2 Oculus Rift hat is officially redeemable by those who were part of the Oculus ...

You can check out the post in full here. I for one, had no idea that the hat took it's initial cues from the image on a TF2 noisemaker, and it's neat to see an early iteration of the hat ...

Ever since hats and other customization items were added to the game in 2009, TF2's passionate community has spent years trading, buying, and collecting them. An unfathomable amount of hours have ...