Even though Haven: City of Violence is a game of imagination, visual aids and props can be used to accent the "film noir" feel of a situation. The Haven: Concrete Jungle miniature rules create a game that simulates the outrageous urban combat that happens so often in the city of Haven.
If you like your first dose of Haven: Concrete Jungle, then feel free to use it as either a stand-alone game of urban warfare or as an aid for the Haven: City of Violence RPG system.