Hot Sand of Antarctica

As a result of the rapid melting of glaciers and permafrost in Siberia, a giant release of methane occurred into the atmosphere, which led to an explosive increase in temperature throughout the Earth. A few years later, the only place where people could survive was Antarctica. There were no more countries and economies; human civilization was on the edge of extinction. In the chaos that reigned, the heads of criminal groups, who are called "bosses", came to power with the help of cruelty and violence. Each of them has established its own laws on their territory, which have nothing to do with the concepts of humanity, compassion and justice. Your main character is an experienced warrior, the right hand of the most powerful boss, nicknamed Mongol. His tasks include protecting the borders of Mongol's territory, eliminating enemy scouts and saboteurs, as well as directing various combat operations.