This Team Fortress fan animation created with Source Filmmaker is a cool tribute to the ZombiU CG trailer.
Valve have created Expiration Date, a 15 minute animated short featuring all the Team Fortress characters.
Dota 2 - Cinematic Trailer
Valve have released an action packed cinematic trailer for their new game, Dota 2.
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.