Storyline
The backstory essentially is that a long time past, the people called Tuatha de Danaan ("Children of Danaan") arrived in the lands of Temuair, meaning Earth-Sea in the Tuathan tongue. There was formed the civilization called Hy-brasyl. It was a peaceful time, in harmony with nature. For the first time, after a millennium of peace had existed, a man is found murdered, and exploration into the outside world begins. With this comes the harnessing of the elements for magical power.
Along with this exploration, Kadath, the worldly home of the Gods, is discovered. Dark altars and temples are constructed, and the Priests of these Dark Gods go crazy in their search for Godly knowledge. In this madness, Hy-brasyl is drowned, with the death of all those who know the forbidden knowledge.
Over 300 years go by until the knowledge is regained, and along with the four other elements (Fire, Earth, Water, Wind), a fifth is discovered: Darkness. With this discovery come the Dubhaimid, the dark ones. Formed by the Dark God Chadul, these dark forces terrorize Temuair. The wise amongst the Tuatha de Danaan return to the worship of the Light Goddess Danaan, who enters into the Great War with Chadul.
Many years later, the Six Lords of Temuair meet to form an unholy Pact with Chadul. Led by Tenes, King of Ardmagh, the Anaman Pact is formed, granting each of the Lords a 1000 year lifespan and the unity of Temuair. In the ensuing war, Danaan's chosen Paladin, Ainmeal, fights against Tenes in battle and wins, ending another dark threat. Ainmeal renames Ardmagh to "Loures."
Again much time of peace passes, until the 4th Empress of Loures, Ealagad, comes to power. She seeks to rekindle the power of Chadul and does so, restoring the Dubhaimid to Temuair. Danaan again intervenes, this time by sacrificing Herself in order to defeat Chadul for the final time. With the end of this Shadows War, the first of the Aislings (Dreamers) are born, free from their old mundane life, and making a difference in the new Atavism Age.
Read more about this topic: Dark Ages (video game)