So this looks cool, but the problem with collab city is that almost none of the buildings have interiors, and those that do (for the most part) have little space. That means you'll have to make most of your base in the streets or rush to secure the building with the most interior space. I guess you could try it though, it'd still be better than the desert map. it's a shame Reinforcements never released his BR map.
Does anyone have a save of Desert Town? I might have a go at it and try to balance it out, wall off some windows, etc.
-snip-