Just finished playing through Silent Escape. It's a very good mod, one of the ones that gives you hope for hl2 modding. I wish I had have recorded a playthrough video.
For the most part it is a very pretty mod, a lot of attention has gone into colour correction and lighting, and although it's often done to overkill levels, the fog particles look purdy.
There is also a fair bit of voice acting in the mod, which is delivered poorly but gets the message across very well. This is one of the mods you should play. Get it.
http://www.moddb.com/mods/silent-escape