The unexpected explosion of the biochemical base, millions of people infected and mutated into cannibals, the former prosperous city has become a purgatory of the world, the unknown energy hidden in the city is the only possibility to overcome this disaster. What will be the pioneers who venture to find them? In the past, prosperous cities became purgatory of human beings. Aliens swarmed from all sides to 100 meters high buildings and could not be retreated. Should they give up surrender or be stronger than their rivals? It's time to show your courage and strength!