Diablo (series) - Story

Story

Diablo is set in the world of Sanctuary, created by the Archangel Inarius for angels and demons weary of conflict between the High Heavens and the Burning Hells. When unions between angels and demons created powerful beings called Nephalem, the demon Lilith sought to raise them as her servants and rule Sanctuary, leading to her banishment and the destruction of most of the Nephalem. When Lilith returned, a farmer named Uldyssian-ul-Diomed stopped her by destroying the cults of both Inarius and Lilith, sacrificing himself to protect the world.

In an attempt to keep the lords of the Burning Hells from taking over Sanctuary, the Archangel Tyrael captured the three prime evils: Mephisto, Lord of Hatred; Baal, Lord of Destruction; and Diablo, Lord of Terror. The prime evils remained imprisoned until Diablo, through contacts with mortals living in the town above him (Tristram) began bringing minions from Hell into Sanctuary. While a hero managed to slay him, the hero soon transformed into a new host body for Diablo's soul. With Diablo setting about to free his brothers, a band of heroes went after him, managing to slay all three prime evils. In the process, the Worldstone, designed to keep Sanctuary hidden from the High Heavens and the Burning Hells, was destroyed.

Eventually, Diablo is able to be resurrected once again, this time in the body of his daughter. Through subterfuge, he manages to obtain the souls of all the Prime Evils. Containing those souls within his own, Diablo begins to assault the High Heavens and nearly destroys them before a new hero kills him and banishes him yet again.