Changes

This [[NPCs|NPC]] was found in the small town area where new characters began the Blizzcon 2008 demo. He was a guard and nominal leader of the few surviving humans in the area, and had special dialogues for each of the 3 characters. During the dialogues he imparted information about a meteor that had struck the Cathedral and awakened evil within, and either warned or encouraged the player to investigate.

The story telling mechanism of such NPC dialogues and plot devices is a simple one; the characters, NPCs and your own hero, know more about the story than you, the player, do. So players learn about the world and their own character's personality by watching and listening to the interactions between their character and the NPCs.