Tobias "Krieg" Krieger was found as a stowaway, wounded on a cargo ship that docked in the south waters of Chernarus, a few months before the infection reared its ugly head throughout the lands. He was promptly admitted to the nearest hospital to treat his wounds. Efforts were made to find out what had happened to him and the reason of his presence on the cargo ship. He had no official papers, nothing to identify him, no phone, no way to contact anyone who might know him. His incoherence and erratic behavior quickly forced the authorities to admit him to the Storozh complex, helped by the fact that he had broken the law by boarding the ship illegaly. He would spend days banging his head on the walls, screaming and raging, trying to bend the bars to his cell to no avail. Official records from the prison management reveal that he had to be confined due to keeping other inmates awake at night, speaking nonsense and claiming to be innocent. During one of those nights, he presented himself as Tobias Krieger, an American of German descent. Seemingly more cooperative than usual that night, he was allowed a writing pad and a pen so that more information could be found about him and is whereabouts on the island. His wrists and ankles secured with chains, this is what he wrote down before shoving the pen down a guard's throat and letting out a bloodcurling "KRIEG!" that could be heard on the entire island.
This is the last official record from the prison files, no one really knows what happened to Krieg after this night.
After South Zagoria was ravaged by the infection, Krieg roamed the lands, unleashing his rage on the meat puppets that would cross his path. He would mention the "crossbar hotel" to random strangers he came across as being a place where he made many friends and had the best meals in the country. Obviously his general demeanor scared away most sane people, until one fateful day he was found by a group of strange people wearing helmets. He offered to share the meat he had ravaged off a few four-legged fleshbags on the side of a hill. They came to meet again a few times over a few days. Whether it was morbid curiosity or actual fascination, they allowed him to stay in their company and adopt him as one of their own.