The official website of Diablo III updated new pieces of artwork and screenshots, and a timeline covering important events that have occured across the Diablo series.
• Increasingly deranged, King Leoric begins imprisoning all who question his authority and executing them as traitors. He declares war on the kingdom of Westmarch.
• Diablo kidnaps and possesses King Leoric's only son, Prince Albrecht.
• Lachdanan, captain of King Leoric's army, returns from the disastrous war with Westmarch and is forced to kill Leoric. The fallen monarch curses Lachdanan and his followers with his dying breath. Not long afterward, Lachdanan and the king's guards are attacked by Leoric, resurrected as the Skeleton King, as they attempt to bury him.
• Archbishop Lazarus leads a group of villagers into the cathedral and abandons them to a bloodthirsty butcher demon. People begin fleeing Tristram in droves.
• A lone hero arrives in Tristram and defeats the bloated, fetid butcher demon.
• The hero kills Archbishop Lazarus and defeats the Skeleton King.
• Diablo is defeated by the hero, who then tries to contain Diablo within himself. Despite the hero's noble intentions, his valiant spirit quickly succumbs to Diablo's corruption. He becomes the Dark Wanderer, leaving Tristram behind shortly before legions of foul demons attack and destroy the town and its inhabitants.