The United States enacts the 18th Amendment, initiating Prohibition and leading to the rise of organized crime, including mafia activities.
The U.S. stock market crashes, leading to the Great Depression, impacting crime rates and the operations of mafia organizations.
The 21st Amendment repeals Prohibition, significantly affecting the business operations of many crime families.
The Federal Bureau of Investigation (FBI) was established, increasing law enforcement efforts against organized crime.
Tommy Angelo works as a taxi driver in the city of Lost Heaven before becoming involved with the Salieri crime family.
Tommy witnesses a murder committed by the Salieri family and is forced to join them to stay alive.
Tommy completes his first task for the Salieri family, gaining their trust and beginning his rise in the crime world.
Over several years, Tommy takes on increasingly important and dangerous jobs within the Salieri family.
Tommy decides to be an informant for the police, betraying the Salieri family to bring down rival mobsters and internal enemies.
Tommy is ambushed by Salieri family hitmen but manages to escape with the help of the police.