Niko Bellic (1978-Present) is one of the four main protagonists during the 1998 - 2009 Chapter Arcs and a non-playable central character during the 2013-2015 Chapter Arcs in Grand Theft Auto VI. He also becomes playable during the final mission.
Niko was born in Eastern Europe, most likely the Balkans. It was implied that his father was an abusive alcoholic. His mother, Milica Bellic, was unhappy that her son grew up in such a harsh place. In a conversation with Patrick McReary, Niko reveals that he had a brother who died during the Bosnian War. According to the dialogue in the mission Taking in the Trash, Niko dreamt of becoming an astronaut when he was a child. In a conversation with Dwayne Forge, Niko mentions the place he grew up did not have electricity until he was twelve. In a conversation with Kate McReary, Niko says that he found out his aunt (Roman's mother) was raped and murdered, some time after Roman's departure to the United States; knowing Roman would be even more devastated if he knew the true circumstances of his mother's death, Niko covered up what happened, telling him that she died in a house fire.
Niko grew up in the harsh environment of the Yugoslav Wars, and was a teenage soldier of presumably the Serb-controlled Yugoslav People's Army or its many aligned Serbian paramilitary forces and militias (The Yugoslav Wars being between 1991 and 1995, this means Niko was only 13-17 years old at the time). Niko says that he was betrayed "ten years ago", making it closer to 1997 or 1998 (although Florian claims that its was "twelve or thirteen years ago" in a phone call after the mission That Special Someone). He served as a helicopter pilot and an infantryman during the war, and during the mission Easy Fare, Roman alludes to him driving a tank.
During the war, Niko both witnessed and committed numerous atrocities, which led to his cynical perspective on life, and a certain degree of regret, depression, and emotional detachment. Eventually, Niko's unit of fifteen men (most of them friends from his hometown) were ambushed by enemy forces, but Darko Brevic, Florian Cravic, and Niko himself survived. Niko concluded that either Florian or Darko had sold the group out, and he vowed to uncover and kill the culprit, not only to gain revenge, but also to hopefully 'close the book' on the incident, and move on with his life.
Niko had trouble finding steady work after the war. Niko's cousin, Roman, had already moved to America to start a new life in Liberty City while Niko spends the next decade working in the European criminal underworld, leading to a period of incarceration. After his release from prison, he began working for a human trafficking ring led by Ray Bulgarin; when a boat involved in the operation sank in the Adriatic during a smuggling run into Italy, Niko swam to safety, but everything and everyone else was lost. Bulgarin believed that Niko had intentionally scuttled the ship and stole his money; the gangster's reach was too great within Europe, so Niko joined the merchant navy to escape Bulgarin's influence. Niko also recalls to Roman Bellic that a bar had burnt down in Europe and there was only one bottle of Vodka left and they sat down and finished it off during the conversation in Roman's Sorrow.
During the Events of Grand Theft Auto IVEdit
Niko spent seven months on the cargo ship Platypus, which eventually smuggled Niko into Liberty City.
During the game, Niko says he moved to Liberty City because he wanted a new life by living the American Dream, but when he does arrive in Liberty City, he has nothing except Roman. Niko parted ways with Hossan and the Platypus crew there, partly to reunite with his cousin, and partly to track down Florian Cravic, who had moved to Liberty City after the war. Roman had been boasting of great success in Liberty City, but in truth, his assets amounted to a small, gritty taxi depot and rundown apartment, and he was saddled with heavy debts due to his gambling habit. Niko would assist Roman in his taxi business, and protect his cousin from the loan sharks who were harassing him. Roman's connections eventually led to Niko making friends with the Little Jacob, and taking work with the Russian Mafia, setting in motion the events of the game.
After killing Vlad, Niko is nearly killed by Dimitri Rascalov & Mikhail Faustin; but spared. After killing Mikhail, Dimitri reveals his connections with Ray Bulgarin and turns against him, even trying to kill him. Niko and Roman were then run out of Hove Beach in Roman's Sorrow, in which his Broker Safehouse and Roman's taxi depot were burnt down. It is at this point that Niko becomes a hitman and an associate of many. Mallorie Bardas, Roman's girlfriend, introduced him to two contacts, Manny Ecsuela, and Elizabeta Torres. Niko develops affiliations and becomes a worker of the McReary Family, Playboy X, Dwayne Forge, the Pegorino Family and some others over the course of the game. Maximizing his hatred of Dimitri, Rascalov gets Roman kidnapped.
Niko eventually becomes in forced contact with the United Liberty Paper, who blackmails him into doing some "country-protecting" work. Also, Ray Boccino managed to help Niko find Bernie Crane; when he confronts him, Bernie, begging for forgiveness, claims he is not only a homosexual but that he is not the one who betrayed Niko (despite escaping). Niko forgives him and actually begins helping Bernie with his life.
The U.L.P. successfully manages to get Bellic Darko Brevic in That Special Someone. Taking into consideration how it will make Niko feel and how Darko is actually living a bad life, Niko is unable to decide whether to kill him. Before choosing, Darko reveals that he betrayed Niko for only $1000, enraging him. The player then decides if he will kill Darko or let him live.
Niko will finally end the game in Deal or Revenge and kill Dimitri Rascalov, at the cost of either Roman Bellic or Kate McReary's life.
At the end of the game, a Weazel News report states that Niko is wanted for questioning by the police (although not as a suspect) for the events of his cousin's wedding.
Niko's immigrant status is uncertain, and arouses the suspicion of the LCPD and FIB. Although Niko often protests that he "has his papers" while fleeing police, Roman says that Niko does not have a visa. This is further evidenced in a Liberty Tree article about the death of the Platypus's captain, Zorba Philippidis, which states that none of the crew possess visas.
If Diamonds Are a Girl's Best Friend is played after Pest Control, Niko tells Packie that he intends to go after Ray Bulgarin, although Ray would be killed by Luis Lopez.
If Niko chooses to seek Revenge on Dimitri, Niko's love interest is killed, so all he has left is his cousin and friends. He most likely gives up his life of crime and tries to live a normal one with Roman, as is hinted by the comments made about him in Grand Theft Auto V.
During the Events of Grand Theft Auto VIEdit
In 2009, Niko continues to be a hired gun for many criminal organisations and has gained enough money to franchise his company, Bellic Enterprises for his friends and family, most importantly, his cousin Roman Bellic and his child. At somepoint, Niko meets ex LCPD Police Lieutenant and current Gambetti crime lord Henry Deus to do various jobs for him. Niko later part ways with Henry on bad terms and has given up a life of crime.
In 2013-2014, Niko has moved to London, England with Liberty City Crime Lord Donatello Abarca in order to expand his company there.
Niko's ability is invincibility, as he can take less damage, but can inflict much damage to the enemies and is immune to physical attacks while in this stage, which is similar to Trevor's but is different as he is not angry when in this stage.
Niko is considered to be the deuteragonist of the game, due to his involvement with the game's antagonist and acting as an important ally to Michael De Santa.