I would like to see a hostage rescue verison. Add on the outside skate board ramp with doors at the lower level. The CT's start from the skateboard ramp with a heli leaving. The wall over the skate ramp with the hole from one of the upper levels. Add the 2 large gun torrents using maybe the para models. Hostage in random places on the upper level.

I wish there was a slow fall in the middle like the movie. :)