Roman's Child

The unborn child of Roman Bellic and Mallorie Bardas, and nephew/niece to Niko Bellic, is revealed after the credits of Grand Theft Auto IV. In the Deal ending, it is revealed to be male, although in the Revenge the sex isn't known as Roman says he will call it Kate if it is a girl.

Deal
In the Deal ending, it is confirmed by Mallorie that she was pregnant with the son of Roman, who was killed by an assassin's stray bullet; the assassin who was sent by Dimitri Rascalov to assassinate Niko Bellic, but failed and was killed by Niko. Niko then tells her that "He will have nothing to worry about".

Revenge
In the Revenge ending, Roman reveals to Niko that Mallorie is pregnant with his child, and if it is a girl, they would name her Kate, in honor of Niko's girlfriend Kate McReary, who was killed by Jimmy Pegorino; Pegorino was aiming for Niko, in retaliation for killing Dimitri Rascalov and destroying what little influence he had in Liberty City, but hit Kate instead.

Mission appearances

 * Deal
 * A Revenger's Tragedy (Mentioned in post-mission phone call)
 * Revenge
 * Out of Commission (Mentioned in post-mission phone call)

Trivia

 * The child's nationality would be Serbian-Puerto Rican (Roman is Serbian and Mallorie is Puerto Rican).
 * By the time of GTA V, he/she would be 4 or 5 years old.