Invincible Doomsday System

When the doomsday comes, horrific things sweep across the world, and the earth becomes a playground for zombies and alien creatures. As the protagonist obtains an invincible system and is reincarnated unexpectedly, he is faced with the hope of saving the world and bringing mankind to save the earth. How will he face the tragedy of the world, the exposure of human nature, the attacks of zombies, and the death of his relatives and friends around him? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.