The Vercetti Gang is a very powerful underworld outfit based in Vice City. It is led by Tommy Vercetti, a renegade Forelli family member who has assumed control of numerous businesses and property ventures in Vice City, circa 1986. The organization is known to be involved in various illegal enterprises, including extortion, drug dealing, counterfeiting, protection racketeering and prostitution.
Tommy Vercetti is originally dispatched by the Forelli family to Vice City to oversee a drug deal funded by Forelli money; the deal was supposed to be the beginning of the family's expansion "down south". However, after the deal is ambushed by Diaz's gang members, Tommy is forced to start over in a new town with no money or property, and aided only by Ken Rosenberg, a bent lawyer with Forelli family connections. He eventually kills the perpetrator of the drug deal ambush, Ricardo Diaz, aided by new associate, Lance Vance. Following the killing, he personally seizes several properties and business assets in the city, with no assistance from the Forelli family, forming the powerful Vercetti Gang in the process. The expansion of the Vercetti Gang throughout Vice City makes Tommy a very rich, powerful, and influential man, infuriating Sonny Forelli, the Don of the Forelli family, who demands his cut of the substantial profits. Tommy's refusual to give in prompts Sonny to send collectors to Vice City to attempt to cut into Tommy's businesses. However, Sonny's plans are immediately thwarted by Tommy's massacre of the Forelli family's collectors, precipitating a personal confrontation between Sonny and Tommy in the huge Vercetti Estate. Tommy attempts to pay Sonny with counterfeit money, but Lance reveals his scheme, resulting in a massive gunfight that leads to the deaths of Lance and many Forelli family members, including Sonny himself.
The Vercetti Gang is presumed to remain in power for an undisclosed time, until at least 1992 (though it is presumed by some fans that it ended by 1998 due to the fact that in Grand Theft Auto:Liberty City Stories that people say "I can't wait until I retire to Vice City where there is less crime"). In the prequel film to San Andreas, The Introduction, Ken Rosenberg, who is 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 leads to Ken's subsequent assignment as a middleman for the Leone, Forelli and Sindacco families over Caligula's Casino in Las Venturas, and his later employment as an accountant to rapper Madd Dogg. The Vercettti Gang may also be called Vercetti Family as Tommy Vercetti was once a Mafia Mobster in the Forelli Crime Family.