Want to try it before you buy it? They've got a free rules download available.
From the release:
Inspired by the history of the great city, Gangs of Rome takes place in the shadows of the Empire where the heads of ambitious houses have gathered fighters forged hard by the streets to do their bidding and enact their schemes.
As a Dominus, the head of a house of Rome, you will seek out the most brutal of Romes criminal denizens, plying them with the promise of wealth and glory should they aid you in your plan to rise to the Senate of Rome and cast down all enemies before you.