Over 150 years before UAC’s space marine became Doom, the life in Narus was orchestrated to bring həll here, make human sacrifices to feed the glory of high priests on the anvils of həll, their people. Then a man was born called Thomas Anderson, a computer programmer who worked and lived the pipeline or the grind of Narus, living in contempt & dissatisfaction led him to Morpheus, a terrorist along with his aid Trinity, a computer hacker, the trio called him Neo, who brought Narus to its knees, demanded reprogramming of the code inserting the code of the One, the choice of doing what he needed to do, change the Matrix as he saw fit. Later their was war between Narus & Neo, but before he died he was able to upload his consciousness into the mainframe. Years later when the Doom Slayer fought hell in UAC he found the code of the One, divinity to stop həll, super human abilities to destroy Demons & Titans. That code was set running in UAC through its now dormant parent Narus, who’s high priests help Doom to enter the divinity machine, which was just a catalyst to unlock humanity’s hidden super human abilities, by taking in some argent energy to bring həll here like rest of UAC, but Doom retained his hatred for Demons and so wrecked great misery and torment on those undead wretched souls of foul dark lords creation. But to destroy all Demons he must take control of Urdak and its high priests who now control the fate of humanity from being fed to həll for the prosperity of the father makyr.