Last week Brown Bag Films revealed they have been working an animated film using the Source engine. The trailers confirm that the film sets will also be playable. "A new workflow for animations and game development, simultaneously" highlights the process of both mediums being developed at the same time, an exciting prospect. Trailer 1 | Trailer 2
Concept art for characters and an environment in the film also materialised which you can see if you read below. You can read more about the film, director and Brown Bag Studios here.