Events concerning the Grand Theft Auto series in 1978.
- Ricardo Diaz bribes the INS for a green card and enters the United States of America from Colombia.
- Ken Rosenberg begins practicing law in Liberty City.
- Darius Fontaine founds Inversion Therapy.
- Niko Bellic is born in Yugoslavia.
- Bernie Crane, formerly known as Florian Cravic, is born in Yugoslavia.
- Frankie Gallo is born in Leftwood, Alderney.
- Kim Young-Guk is born in North Korea.
- Teafore "Real Badman" Maxwell-Davies is born in Jamaica.
- Lyle Rivas is born in Puerto Rico.
- Luca Silvestri is born in Alderney City, Alderney.
- March 14: Jolene Cranley-Evans is pushed off Mount Gordo in San Andreas by her husband Jock Cranley.
- Sonny Cangelosi dies due to unknown causes.
- Sonny Honorato is arrested for cemetery desecration.
- Mark Lupisella is arrested for manslaughter.
- Harry Hall is arrested for speeding violations.
- Derrick McReary and Bucky Sligo are arrested for armed robbery.
- Don Sonny Cangelosi of the Gambetti Family dies.
- Jon Gravelli takes control of the Gambetti Family after his uncle Sonny Cangelosi's death.
- Giovanni Ancelotti becomes Don of the Ancelotti Family.
- Solomon Richards takes over Richards Majestic from his father David Richards.
- Darius Fontaine founds Inversion Therapy, which later became the Children of the Mountain cult.