Portal: Survive! is a live-action short film based on the Portal game, and its tie-in comic Portal 2: Lab Rat.
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 - Boots
The science of the boots used in Portal 2 is explained in this latest video from Valve.