Terranigma

The planet known to its inhabitants as Earth is composed out of two realms - the surface, or Lightside, and the underground world, or Darkside. Two cosmic forces, called God and Devil by the humans, were fighting each other fiercely until their final battle in Antarctica led to a catastrophe: the continents of the surface world submerged into the ocean, presumably eradicating all life on the Lightside. Meanwhile, the isolated underworld, consisting of frozen crystal mountains and lava rivers, co...