"Life is complicated. I killed people, smuggled people, sold people. Perhaps here, things will be different."
Grand Theft Auto IV follows the story of Niko Bellic; Before the events of the game, he fought in the Bosnian War as a teenager, was betrayed by one of the members (which got most of the squad killed) and is now obsessed with getting revenge. After fighting in the war, bad circumstances led him to work for Ray Bulgarin in human trafficking, which ended with Niko being blamed for a sinking ship and leaving Europe to escape Bulgarin's wrath and power. While spending the next seven months in the merchant navy he made the decision to move to Liberty City, where his cousin Roman claimed to be living a life of luxury (as well as to hunt down one of the two suspected traitors, Florian Cravic).