Zombie Reincarnation Birth Purpose

"Congratulations on the birth of our twelve millionth man!" Park Yu Dwer was a man who created a leading technology to preserve humanity. He managed to make the population increase rapidly. Once upon a time, residents celebrated the birth of the twelve millionth baby thanks to the device. This causes the population to overgrow, to a total of eleven billion. Unfortunately, the birth of the twelve millionth baby was flawed because the baby had two heads. Xin Quan Tien, one of the country's poor people, did not accept. Instead, he walked into the crowd. Some residents also asked why the birth of the baby had two heads. However, Park Yu Dwer refused to answer. Xian Quan Tien finally spoke up. She said that the birth of the baby would only add problems. After a while, several armies roared with a leading flying capsule. Then, they slaughtered the entire population. Xin Quan Tien wasn't afraid of that either. Moments later, several bodies fell. Xin Quan Tien tried to drink their blood. After that, he gave up on being killed because he was tired of his life. After that, he was revived in a game. The game system requires that the characters kills all the zombies without a remnant. However, he was burdened because he had to be a zombie and a killer. In addition, the system only equips its capabilities by around ten percent. He also has two souls, an angel and a devil. He also knew what is the purpose of that game. So? What will Xin Quan Tien do next? Will he be able to win the fight?