[url=http://store.steampowered.com/app/550/][img]http://l4d.com/blog/images/posts/022/BillsHat.jpg[/img][/url] Those of you who pre-ordered [i][url=http://store.steampowered.com/app/550/]Left 4 Dead 2[/url][/i] (for PC on Steam or at participating retailers) now have exclusive access to the momentous event they said would never happen. For the first time in history, two separate Valve universes collide. That's right: it's a [i]Left 4 Dead[/i]/[i]Team Fortress[/i] crossover! This is [b][u]not[/u][/b] fan fiction! This is [b][u]not[/u][/b] a dream sequence! The characters from [i]Team Fortress 2[/i] [b][u]will[/u][/b] team-up with Bill's hat from [i]Left 4 Dead 1![/i] [url=http://l4d.com/blog/post.php?id=3046]Read the full blog post[/url]