3. The Gambetti Crime Family
Featuring in the GTA IV era of the series and led by Jon Gravelli, the Gambetti Crime Family are part of a group of five families who control the organised crime in Liberty City, but are by far the strongest of all the five families. Niko Bellic, the main character in GTA IV is an associate of the Gambetti Family. The Gambettis have also come into conflict with a number of other gangs, mobs and criminal families, most notably the Korean Mob, the Ancelotti Family and Rascalov Family. Although they are seen as the strongest crime gang in Liberty City, they only appear in three missions in GTA IV.