There was more going on in City 17 than just what Gordon Freeman and Alyx were doing. Follow a new recruit as he struggles to find his place in the movement, and see just how sinister the Combine can be.
There isn't much in the skybox right now aside from the citadel, but there will be more of a city in the final version, once I've got the skybox finished.
It looks pretty well, however you could add some 3D depth into it. When I look at it, I have this strange feeling that world ends right behind those two silos and wall at the right (especially there).
Despite this - it's really good.
See the updated version here: Moddb.com