Oskar was born on February 24 1989 in Novigrad, Chernarus. His family lived in the slums, and his parents both worked for a majority of the day for little to no pay. Because of the lack of parenting, Oskar had a lot of freedom, which led him to a life of crime. At a young age, he committed petty crimes; stealing food and supplies to keep himself and his younger brother alive and fed. As he grew older he did small jobs for people in his neighborhood to make a little money so he wouldn't have to steal, although it wasn't long before tasks, like doing the laundry and running to get groceries for someone, turned into stealing things from someone's yard and eventually he was back into petty crimes, but for better pay.
His family came to hate the Russia and blamed them for their problems. Due to his love of his family, he took up a hatred for the Russia as well. In fact, in his early teens, Oskar took up nationalist ideals and would participate in protests, one of which landed him in jail after getting riled up and attacking an officer. Previous to the incident he had had other incidents like this. This time in jail changed him. This jail time fueled his hatred and it also reassured his nationalist Ideals. This made him to participating in more violent protest.
In 2009 he joined a Nationalist Freedom Fighter group. He participated in the 2009 civil war which he witnessed many atrocities—such as torturing and/or killing civilians and prisoners of war—which would ultimately reinforce his nationalist ideals. This group was the best thing that ever happened to him. This group was like a family, He formed many tight bonds that even lasted into the apocalypse.