Complex sentence: He refuses to eliminate her, forcing the alien leader, "The Great Guidance," to teleport to Earth after killing the disobedient Ro-Man, who then attempts to finish the genocide by releasing prehistoric dinosaurs and a massive earthquake on the remaining survivors.
Split into simpler sentences: He refuses to eliminate her, forcing the alien leader, The Great Guidance, to teleport to Earth after first killing the disobedient Ro-Man. The Geat Guidance then attempts to finish the genocide by releasing prehistoric dinosaurs and a massive earthquake on the remaining survivors.