Can someone ID the weaponry, or is it all futuristic?

They are "game guns" rather than real ones but they look like they used Eastern European weapons as their inspiration.

Bungie really should get off their Halo trip and make a sequel to this game. Konoko beats Master Chief any day.

(...Shogo needs a sequel too!)

The gun on the back is a SPAS-12, a shotgun made by itally

Sadly, this game came from Bungee West, which broke, and Shogo came from Monolith, which was bought by Warner Bros (And nowadays makes all the F.E.A.R. stuff)

Sequel where