Valve are introducing the Perpetual Testing Initiative for Portal 2 with this new amusing trailer.
Lil Guardian Pyro
Lil Guardian Pyro is the winner for the best overall prize at this year's Valve Saxxy annual animated film competition.
Team Fortress 2 - Meet the Medic
Team Fortress 2 is now free to play, and along with that great news, Valve have released a new cinematic, Meet the Medic.
Portal 2: Lab Rat - Part One
Read part one of Portal 2: Lab Rat, a comic created by Valve to bridge the old and new game in the series.