Portal joins forces with Half-Life in this short film called When Gordon Met Chell.
Portal 2 - Perpetual Testing Initiative
Valve are introducing the Perpetual Testing Initiative for Portal 2 with this new amusing trailer.
Protector is an animated short created in Source Filmmaker about the harsh realities of civil protection in Half-Life's City 17.
Portal 2: Lab Rat - Part One
Read part one of Portal 2: Lab Rat, a comic created by Valve to bridge the old and new game in the series.