A robot faction is introduced into the Team Fortress 2 equation, via this amazing new trailer by Valve.
End of the Line
End of the Line is an animated short film created with Source Filmmaker.
Team Fortress 2 - ZombiU Crossover (Source Filmmaker)
This Team Fortress fan animation created with Source Filmmaker is a cool tribute to the ZombiU CG trailer.
Portal 2 - Turret Trailer
Valve spills the beans on the technical aspects of the turrets encountered in Portal 2.