Raised in Oblivion X, or simply RIO-X, is an online survival game where the action takes place in Rio de Janeiro, Brazil. In a post-apocalyptic Brazil, specifically in Vidigal (one of the biggest slums in Rio de Janeiro), an infectious virus is spreading around and making people affected by it get unconsciously aggressive and start attacking others. To suppress contagion, the local government built contention walls around the neighborhood: no one gets in and no one gets out. It is then necessary to survive until a cure is found. Behind the walls, chaos is spreading and people fight for survival, even if that means they must kill other survivors to steal their items, or just to satisfy a sadistic need.