I love the attention to detail you guys put in your maps.
The map itself gives off a kind of System Shock 2 vibe (that's the best I can describe it :p).
I would, however, like to see more lighting variety in the interiors, as the different hues of lighting in different rooms could serve as a landmark and help players find their way around the map easier. For example, a flashing red warning light in a dilapidated room would be starkly different from the dark and yellow visuals that you have on the map so far.

Great work! Keep 'er goin

You need more random props at chokepoints to serve as cover, this game is very cover heavy. Overall the feel is there, i agree with the lightning suggestion above.

Think you'd ever port it to Garry's Mod? It would be a good map for it.

Please bring back this map so people can play it on gmod. We would really appreciate it a lot! Also the Hellfire Station!