The Vercetti Crime Family is a very powerful underworld outfit that is based in and around Vice City. The Vercetti Family is headed by Tommy Vercetti, a renegade Forelli family member who has assumed control of many businesses and property ventures during the events of GTA Vice City, circa 1986. The organization is known to be involved in various illegal enterprises, including extortion, drug dealing and organized crime. The Gang cannot be called the "Vercetti Family" because their are members, such as Lance Vance, and Ken Rosenberg who are not italian. But it appears as if he structered it to resemble a mafia family.
Tommy Vercetti was originally dispatched by the Forelli family to Vice City to oversee a drug deal funded by Forelli family money; the drug deal was supposed to be the beginning of the Forelli expansion down south towards Vice City. After the deal was ambushed by Diaz's gang members, Vercetti was forced to start over with no money or property and aided only by Ken Rosenberg, a bent lawyer with Forelli connections. He eventually killed the perpetrator of the drug deal attack, Ricardo Diaz, aided by his new friend Lance Vance. Following the killing, he seized many properties and businesses assets in the city, with no assistance from the Forelli family; he later formed the powerful "Vercetti Crime Family", in the process.
The expansion of the Vercetti's throughout Vice City made Tommy a very rich, powerful, and influential man, infuriating Sonny Forelli, the Don of the Forelli family circa 1986, who was demanding his cut of the profit. Tommy's refusual to give in led the Forelli family to send collectors to Vice City to attempt to cut into the profits of Tommy's businesses. The Forellis' efforts were thwarted, and Sonny Forelli eventually confronts Tommy in person, which leads to a massacre, resulting in the death of many Forelli members, including a recently defected Lance Vance, and Sonny himself in the Vercetti Estate. Following Sonny's death, the Vercetti Crime Family is assumed to have total domination of Vice City.
The Vercetti Crime Family, or at least Tommy Vercetti himself, is presumed to remain in power for an undisclosed time. In The Introduction, the prequel film to GTA San Andreas, Ken Rosenberg, who was also initiated into the Vercetti Gang in 1986, is assumed to have been abandoned by Tommy after Ken is forced into rehabilitation for prolonged cocaine abuse. Following his release, Vercetti no longer takes his calls and their relationship is dissolved. This led to Ken's subsequent assignment as a middleman for the Leones, Forellis and Sindaccos over Caligula's Casino in Las Venturas and then employment as an accountant to rapper Madd Dogg. Some people may consider the Vercetti Gang as a Mafia family, seeing as how they are led by a former mafia member.
Members of the Vercetti's wear blue shirts or yellow Hawaiian shirts, long pants and sunglasses.