Father abandoned him when young, leaving Niko to look after his mother and younger brother who lived through all kinds of struggle in the 10 years after. Niko and his brother had a very strong and powerful bond and would look out and protect each other no matter the situation. City was attacked by a group of mercenaries from serbia leaving the city in ruins and Niko's mother dead. The brothers bond grew stronger as they both pursued a career in the Bulgarian SOF. Went on many operations together and formed a strong bond with a particular squad of 9 including themselves. The squad got sent on a hostage rescue on the eastern coast of the Baltic Sea. Targets were neutralized and the hostages were being extracted before it all went horribly wrong and the squad was ambushed leaving the entire squad including his younger brother dead, while Niko is left unconsious in the darkness.