Valve have announced the Source Filmmaker, their tool for creating animated films in a very intuitive way.
Team Fortress 2 - Mann vs. Machine
A robot faction is introduced into the Team Fortress 2 equation, via this amazing new trailer by Valve.
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.