Valve have announced the Source Filmmaker, their tool for creating animated films in a very intuitive way.
Half-Life: Raise the Bar
Half-Life: Raise the Bar is a fan-made short film inspired by the Half-Life franchise.
When Gordon Met Chell
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.