Storyline

"On Orb Island, the vanguard of humanity's Mars colonization project, an unexpected accident during a particle accelerator experiment opened a dimensional rift. Demons, zombies, and mutated beasts overran the island, leaving the world in a state of distant desolation. A handful of individuals, deprived of their special abilities, mustered their remaining strength, facing the harsh reality to survive against all odds. The thought of defeating the EndBringer lingered in their minds, and they eventually embarked on an inner struggle. To save the world, they had to confront the profound darkness within themselves."