After My Character Collapsed, I Saved the Apocalypse

When the apocalypse comes, I bind a role-playing system. It said that in order to gain the power to save the world, I must become: a kind person, an indifferent person, a ruthless person, and a devil in order - and finally cut off all humanity and become the way of heaven. I did. I watched my parents die, part ways with my only brother, and become a night demon that everyone feared. Just as I was about to complete the final step, my brother died in my arms. The system forced me to become a heartless god. This time, I chose to let the character completely collapse.