Like Sleeping Dogs, the Mafia games are the more serious of the open world car theft simulators, existing on a whole other end of the spectrum from the likes of Saint's Row or Grand Theft Auto.
I remember when I first started playing Mafia II, my wife asked what this game was about. My immediate response was “It's GTA, but you have to drive the speed limit.”
The third entry in the series is looking very promising, and those trailers are giving off a very serious classic mobster movie feel with a hint of a Tarantino twist. This one arrives in October, so there's not too long to wait to get your fix of organized crime mayhem.