An intersection in Chicago has the Thompson Center, city hall, a courthouse, and an office building with a shopping area on the ground and basement floors.

All 4 buildings have tunnels connecting them underground. The Thompson Center and City Hall have unique designs, and the Thompson Center/Courthouse' big glass windows would be the perfect sniping spots.

Fighting could take place on three levels, in buildings with vastly different designs, and it is in the middle of a downtown area so you could toss in buses and cars to act as cover in the streets.

I worked for the governor for a while and his office was on the top floor of the Thompson Center. I thought about how it would be a great FPS map nearly every day.

Its too big of a map to be COD, too small to be Battlefield. So IDK what game it would be good in, but damn, I'd love to see it.