Marco Forelli is a member of the Forelli Family who was the leader of the organization in 1992, having taken over after his brother, Sonny, was killed by Tommy Vercetti in 1986. It is under Marco's leadership that the Forelli family begins to decline, eventually losing their role as the most powerful mafia family in Liberty City to the Leone Family.
Marco, as leader of the Forelli Family, agreed to a joint investment between his family, the Leones, and the Sindaccos in the Las Venturas luxury casino Caligula's Palace. However, after the death of Johnny Sindacco, Salvatore Leone betrays the Forellis and sends Carl Johnson to Liberty City to assassinate Marco, which he does, cornering and shooting him in the back of Marco's Bistro.
The character's name was never mentioned in the game, although audio and text files with his name remain.
- Saint Mark's Bistro (Killed)