Murders by Niko Bellic

There are a lot of hit missions in Grand Theft Auto IV, and Niko has accrued the greatest body-count of any GTA protagonist thus far. Here is a list of his intended targets ("collateral" murders such as those of unidentified gunmen, pedestrians, or police are not included):

Murders

• Kemal Vulaj and Bledar Morina - The first murders by Niko in Liberty City. Niko murdered the two in the defense of Roman Bellic.
• Dardan Petrela - Murdered for assaulting Roman Bellic.
• Vladimir Glebov - Niko shoots him in the eye for sleeping with Mallorie Bardas.
• Lenny Petrovic - Murdered on orders of Mikhail Faustin.
• Jason Michaels - Murdered on Faustin's order for "messing around" with Faustin's daughter.
• Lyle Rivas - Chased and killed on orders of Bruce Kibbutz.
• Mikhail Faustin - Murdered on orders of Dimitri Rascalov, and to appease Kenny Petrovic.
• Tom Rivas - Murdered for not paying off his debt to Bruce Kibbutz.
• Jayvon Simson - Murdered for ratting on Dwayne Forge.
• Tom Goldberg - Murdered for giving Francis McReary potential legal trouble.
• Marlon Bridges - Murdered on Trey Stewart's orders.
• Trunchez Brothers - Murdered so that Dwayne Forge can get the Triangle Club back.
• Oleg Minkov - Murdered on orders of The United Liberty Paper
• Teddy Benavidez - Murdered for failing to pay Ray Boccino.
• Kim Young-Guk - Murdered on Jon Gravelli's orders.
• Aiden O'Malley - Murdered for trying to testify against Derrick McReary.
• Bucky Sligo - Murdered on Derrick McReary's orders for threatening the McReary family.
• Anthony Spoleto - Murdered on Gerald McReary's orders, to sour the relationship between the the Ancelotti crime family and the The Albanian mob (who were framed for the killing).
• Frank Garone - See above.
• Charles Matteo - Murdered for discovering Phil Bell's role in sabotaging a cocaine deal between the the Ancelotti crime family and the Russian Mafia.
• Isaac Roth - Murdered for threatening Ray Boccino.
• Luca Silvestri - Murdered for stealing diamonds from Ray Boccino.
• Joseph DiLeo - Murdered in a shootout with Niko Bellic.
• John Barbosa - Murdered in a shootout with Niko Bellic.
• Ray Boccino - Murdered for being a potential rat on James Pegorino's orders.
• Anthony Corrado - Murdered for leaking information to the FIB via wire, for James Pegorino.
• Dimitri Rascalov - Murdered for betraying and trying to kill Niko.

Random Encounter Kills

• Eddie Low - Murdered by Niko in self-defense (Eddie Low is a random character, so killing him or even encountering him in the first place is optional).
• Clarence Little - Can be spared, although in a later random encounter, he must be killed anyway, unless the encounter is avoided all together.

Choices

• Ivan Bytchkov - Niko can let him fall from the building, on Vlad's orders, or help him up.
• Cherise Glover - Niko can shoot her in Ruff Rider, or let her live.
• Clarence Little - Niko can kill him, on Francis McReary's orders, or let him live.
• Alonso Gomez - Niko can kill him, or let him warn Teddy.
• Jim Fitzgerald - Niko can kill him by shooting him off his bike or if left alone, Jim will drive into a train and blow up without Niko harming him.
• Adam Dimayev - Niko can kill on orders of The United Liberty Paper or just leave.
• Darko Brevic - Niko can either take revenge by shooting him multiple times, or spare him.
• Sergei - In the Deal storyline, Sergei attempts to kill Niko, but kills Roman instead; Niko kills him in revenge.
• James Pegorino - In the Revenge storyline, he is killed for killing Kate McReary.
• Unnamed Jewish Mobster - Niko can kill him in the Majestic Hotel or walk away.

Kill One Or The Other

• Trey "Playboy X" Stewart or Dwayne Forge - Both characters ask Niko to kill the other.

• Francis McReary or Derrick McReary - Niko can shoot either with his sniper rifle; again, both have asked Niko to kill their opposite number.