So the internet was happily showing off leaked video footage of fan project Black Mesa: Source until it was unfortunately pulled down. Whilst not the same video, the folks over at Lambdageneration were sent other footage from an anonymous source of the project’s Surface Tension chapter.
The footage is not of the most updated mod nor is it of the best quality (it was recorded over Skype and music was added in by Lambdageneration). At the very least though, you can get an idea of the project.
Black Mesa: Source is a fan mod of Half-Life.
(Via Lambdageneration)