This game takes place after an apocalyptic attack and you're one of the last survivors. Everything you see around you is the result of the government's most secret project called "Project X".
The project began due to the identification of strange creatures beneath the territory of the country. After many studies, it has been identified that these creatures are a new species that resembles us, humans, only with a very rare genetic mutation called the "X" gene and that they do not have the ability to feel fear or pain at all!
But one day everything got complicated, the government that was in those days collapsed, and everything was just abandoned. All the scientists who worked on the project simply disappeared, which eventually turns out to have become part of this strain, and has reached a state of global spread!
Your goal is to survive, complete quests, explore the huge wild world, eliminate enemies, level up, and create a safe place for the rest of the survivors.