171 A.D., a great evil lurks in the shadows of ancient Rome, one that corrupts the souls of man and gives shape to the will of demons. As an initiate into the Realm of Sacred Mysteries, you have learned your mentor has been taken along with other members of your faithful brethren. The challenge for you is to confront the horrors of the labyrinthine catacombs that are located beneath the city where they have been imprisoned as victims of a sinister conspiracy. Corruption, possession, and evil await you, however, divinity will bestow upon you a blessed arsenal that will bring your numerous opponents to their knees. By these mighty powers, restore these tormented souls and bring light into the darkness. Steel your resolve and challenge immortal enemies as you dive deeper into the depths, to the very brink of hell and damnation. Face demons and beasts of unspeakable horror. Follow your divine quest through the catacombs and unravel an engrossing tale that tests you against the profane and unholy, stepping into the legacy of a Guardian of Truth. Intelligent and dangerous opponents, each with unique tactics and powers. Expansive levels in a multitude of dynamic realms. Command a diverse arsenal of weapons, unlike any ever created by mortal man. Intense First-Person gameplay with a pacifist gore free approach.