Dota 2 - Cinematic Trailer
Valve have released an action packed cinematic trailer for their new game, Dota 2.
Portal 2 - Authoring Tools Open Beta
The universally acclaimed Portal 2 is getting a level editor. Valve has launched an open beta for the game's authoring tools.
Portal 2 - Boots
The science of the boots used in Portal 2 is explained in this latest video from Valve.