Humanity survives generations underground. Its engineers and scientists created the S.A.M (Survival Autonomous Machine) machine to explore the dangers underground, as the planet's surface appears desolate!Radiation emitted by laboratory-grown creatures has contaminated surface air and animals, creating bizarre mutations and amalgamations in terrestrial beings. Over time, these creatures also spread underground, forcing humans to erect a fortified base to protect themselves. With supplies running low, humans developed S.A.M to obtain resources without exposing the population to