Valve are introducing the Perpetual Testing Initiative for Portal 2 with this new amusing trailer.
Valve have created Expiration Date, a 15 minute animated short featuring all the Team Fortress characters.
Half-Life Black Mesa
A relentless team of fans have finally released Black Mesa a remake/upgrade of the first Half-Life game from Valve.
Meet the Medic - Behind the Scenes
See outtakes and learn about Valve's creative process in this behind the scenes article for their Meet the Medic short.