Murders Committed by Niko Bellic

There are many hit missions in Grand Theft Auto IV, and Niko Bellic has accrued the greatest body count of any GTA protagonist thus far, most likley because he works as a hired gun instead of a creating a criminal empire. Here is a list of his intended targets ("collateral" murders such as those of unidentified gunmen, pedestrians, or police are not included):

Murders

 * Kalem Vulaj and Bledar Morina – They are the first murders by Niko in Liberty City. Niko beat both to death 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.
 * Charlie - Murdered for having attempted to arrest Niko Bellic, Trey Stewart and Johnny Klebitz.
 * 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 Ancelotti crime family and 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.
 * Jim Fitzgerald - Murdered after causng trouble for Ray Boccino
 * 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.
 * James Pegorino - Murdered for killing Kate McReary (only in "Revenge" storyline)
 * Sergei - A Hitman sent by Dimitri to kill Niko at Roman's wedding but Kills Roman instead. (only in "Deal" storyline)
 * Dimitri Rascalov - Murdered for betraying and trying to kill Niko. Also for the responisibility of Roman's Death (only in "Deal" storyline)

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 altogether.

Choices

 * Jimmy - Niko can kill him during the mission Clean Getaway. It would change the dialogue with Vlad through the phone.
 * 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.
 * Adam Dimayev - Niko can kill him or leave
 * Alonzo - Niko can kill him, or let him warn Teddy.
 * Unnamed Jewish Mobster - Niko can kill him in the Majestic Hotel or walk away.
 * Vasily - Niko can kill him in a drive-by in the mission Wrong is Right.
 * Darko Brevic - Niko can either take revenge by shooting him multiple times, or spare him.

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.
 * Sergei or James Pegorino-Sergei is killed only in Deal, but, Pegorino is killed in either, but, in deal, he is killed by Dimitri.