Digital Chocolate is suing social game maker Zynga. The casual gaming company led by Electronic Arts founder Trip Hawkins contends they have the rights to the Mafia Wars name, not Zynga.

We are surprised and disappointed by Digital Chocolate s lawsuit, said Zynga in a statement. The timing of the action appears to be opportunistic, and we plan to defend ourselves vigorously.

Mafia Wars is one of the largest Facebook titles, claiming over 27.8 million monthly active users on the social network.

Source: VentureBeat  {link no longer active}