When I first tried Mafia Wars, I find it too complicated since there are a lot of links to click and a lot of notification to read but eventually, as I played it for several rounds I realize its a simple and addictive game with multiplayer feature.
Mafia Wars is from Zynga and can be considered a text based game. You earn experience & money. Player can buy properties then you need to manage & repair after an attack. Buy weapons to complete Jobs in a form of simple graphics. You add your facebook friends as your Mafia, promote and send gift to them. You can level up and distribute your skill points. You can also attack other Mafia Families and rob them. Most likely, this is a game where you build your gang and be the powerful Mafia family in facebook.