Found this on the interwebs today. It is short, but every exciting if you are a fan of the Half Life series. There has been discussion that Valve has been working on their own Half Life movie, but I like the direction this clip is going. Hopefully Valve won't screw their movie up like Hollywood normally does with video game/movie conversions.

http://www.youtube.com/watch?v=Bm5sEaC5tBA