Reincarnation Paradise, but with the Main God Sphere Version

A: Have you seen the opening of Resident Evil? B: Of course. You kill zombies, save the world, and get a perfect ending. A: No, I mean a mad scientist story where you take the villain’s path and leave the villains nowhere to turn. B: What are you talking about? (The synopsis is a bit lacking, so please read the story.) This book is also known as The Villain Route to Clearing the Game the Unorthodox Way and The Reincarnator Who’s More of a Boss Than the Boss...