This is an expansion for Lords of Vegas. You will need the base game to play.

Underworld is the expansion that brings the seedy underside of Vegas to life. You'll be deep in the muck with mobsters, thieves, grifters, and, worst of all, accountants. This expansion comes with a new Underworld board depicting downtown Las Vegas, the current site of the Fremont Street Experience, north of the main board's Vegas Strip. Underworld contains 52 cards depicting characters and events in Vegas.