Necromorphs are mutated and reanimated corpses, reshaped into horrific new forms by a recombinant extraterrestrial "infection". The resulting creatures are extremely aggressive, and will attack any uninfected organism on sight. Necromorphs are the main antagonists of the entire Dead Space franchise. The sole purpose of almost all Necromorphs is to acquire more bodies to convert and spread the infection. They are believed by some to be the heralds of humanity's ascension, but on a more practical level are the extremely dangerous result of exposure to the enigmatic devices known as Markers.