This map was created for HL2dmPromod. If you don't have the mod, you can run this map in Hl2DM with no problem - you will just be missing a few items. The theme is an industrial winterish thing, with some combine artifacts thrown in. I plan on doing a port for normal DM after I finish the promod version. Normal DM is much slower, so I may think about making some changes to suit.
I'm obviously in the ongoing process of polishing the map, so any feedback would be great.