In Criminal Origins, it is never explained why so many people suddenly became violent and mentally unstable. During the game's ending, Rosa hints that a cult is responsible, but she never elaborates. Malcolm Vanhorn blames the Oro Dark Primary, who the player fights as the game's final boss, as the source of all the city's madness. In Condemned 2, however, it is revealed that the Sonic Emitters placed around the city by the Oro are responsible. Members of the Influenced come in many forms and use various attacks.