A Civilization Divided by Radiation

A red button, a nuclear war spread almost all over the world. All lives were devastated, technology regressed, civilization was fragmented, and monsters were rampant. A post-nuclear war border warrior, an attack by a new monster, body mutation, sudden rise of the army, a new power under the wasteland. That battle turned out to be a long-planned man-made disaster. Can the earth's self-preservation mechanism bring about the healing of the 'wound'? What choices do people born in disaster face? Understanding, symbiosis, resistance, destruction...