Valve have created Expiration Date, a 15 minute animated short featuring all the Team Fortress characters.
When Gordon Met Chell
Portal joins forces with Half-Life in this short film called When Gordon Met Chell.
The first minutes of the original Half-Life are brought to life in this live action short, Half-Life: Origins.
Dota 2 - Cinematic Trailer
Valve have released an action packed cinematic trailer for their new game, Dota 2.