A dark and oppressive apocalyptic wasteland: shrouded in eternal night, depleted resources, rampant twisted monsters, and humans struggling on the edge of despair.
Unique power system and survival rules: The "Spark Resonance" system is similar to mental power and source of energy, but focuses more on "resonating" with ruins, antiquities, and even monster corpses to gain power, a cruel survival rule.
Mysterious system/plug-in: "Reverberation Terminal" - a relic of an ancient AI civilization that is parasitic in the depths of the protagonist's consciousness, has incomplete functions, is full of mysteries, and issues high-risk tasks.
