From the intro:
"If there ever was a God, then He has turned His face from this place. I have done such things that you would consider irredeemably vile and depraved and I profited from them all. Morality is an illusion; what is right is defined by the strong and the cunning.
Infernum: Book of the Conqueror is the third volume in the Infernum Roleplaying Game series. It includes:
To Rule in Hell, explaining how to run a domain by overseeing your demonic subjects and harvesting damned souls.
Basic Structures, which shows how to build, augment and maintain constructions and fortifications in the Pit.
Fortresses, describing the mighty citadels of the lords of Hell.
Dark Satanic Mills covers the various factories and industrial sites used by demons to stockpile resources and build armies.
The Game of Lies shows how to manipulate and seduce enemies through an intricate web of politics and blackmail.
War in Hell details mass combat rules and explains how to build and maintain an army to defend your domain and destroy your rivals.
Conquests gives details of various domains across the nine Circles and finally, Freedom in Chains is an introductory adventure for 1st level characters."