In the End of the World, I Have Become Completely Mechanized

The world collapses, all things wither, and only machinery is eternal! Zombies roar and humans wail. There is no salvation here, only mechanical roar. Chen Mo transformed into a mechanical master and wandered alone in the apocalypse. Humanity has long been defeated, so let him create his own era. —— Get killed at the beginning, gain the system, and transform into a mechanical body. And then keep moving forward on the road to revenge. The protagonist acts decisively, but is not completely emotionless towards human beings.