Portal: Survive! is a live-action short film based on the Portal game, and its tie-in comic Portal 2: Lab Rat.
Valve have announced they will release their Source 2 engine for free to content developers.
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 - Mann vs. Machine
A robot faction is introduced into the Team Fortress 2 equation, via this amazing new trailer by Valve.