Valve are introducing the Perpetual Testing Initiative for Portal 2 with this new amusing trailer.
Half-Life: Raise the Bar
Half-Life: Raise the Bar is a fan-made short film inspired by the Half-Life franchise.
Team Fortress 2 - Mann vs. Machine
A robot faction is introduced into the Team Fortress 2 equation, via this amazing new trailer by Valve.
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.