Half-Life: Raise the Bar is a fan-made short film inspired by the Half-Life franchise.
The first minutes of the original Half-Life are brought to life in this live action short, Half-Life: Origins.
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.