The short and simple answer is the Heavy. Valve's Robin Walker revealed the news on the official TF2 blog , documenting in brief some of the changes planned with the update.

The Orange Box--which contains the aforementioned Portal and Team Fortress 2, as well as Half-Life 2 and its first two episodes--is available for the Xbox 360, PlayStation 3, and PC.

The third of Team Fortress 2's nine classes to receive class-specific achievements and unlockable weapons will be the Heavy, developer Valve has revealed.

In the mean time, it's time to play the age-old Team Fortress 2 game of guessing who's next. With the Medic , Pyro , and Heavy now taken care of, I'm hoping for Soldier but expecting Demoman ...

To spur the community into action, Valve is offering Team Fortress 2 for free during the whole of next weekend, which begins 22nd August. Head over to the "A Heavy Update" website to keep up to date.

Update: The Heavy update is now available, with Valve issuing details and a new vignette on the third unlockable weapon, the Sandvich. Original Story: New details on Team Fortress 2's Arena mode ...

Embrace the brutality of heavy metal in Team Fortress 2. Double Fine's Brütal Legend is finally coming to the PC, and it's making its debut on Steam in a week, on February 27. Players who pre ...