[Voren]

Without knowing too much about the game itself...

A high CR society might severely limit the availability of firearms to civilians while also restricting the ability of the authorities to use firearms. IE -- if you're doing your thing on the shady side of society, you're unlikely to see a gun, and if you happen to run afoul of the authorities they're more likely to try to chase and catch you than to shoot you, unless you are demonstrably dangerous.

In terms of specific settings, I immediately think of some Asian city that blends an ultra-modern urban setting with streets packed with bicycles, pedestrians, market stalls, hawkers, peddlers, and so forth, as well as plenty of heavily-scaffolded construction sites.