The Torture Chambers of the Mad King (level)
From Diablo Wiki
The Torture Chambers of the Mad King is a dungeon area within Diablo III that was first seen in the Blizzcon 2010 demo. It was more of a jail-like area than a torture chamber, filled with cells housing the remains of the loyal servants of Queen Alyssa and presumably any others who stood against King Leoric.
Note: The quest associated with the three levels in the Blizzcon 2010 demo (Halls of Agony, Highlands Passage, and The Torture Chambers of the Mad King) bears the same name as the level/area described on this page. See The Torture Chambers of the Mad King (quest) for information specific to the quest line.
The level has a blue/green-tinged color scheme, somewhat different from the greenish vibe of the Forgotten Tombs beneath the Tristram Cathedral (seen in earlier gameplay videos and screenshots). The area houses a series of jail cells, replete with destructible doors.
In the Blizzcon 2010 demo, Queen Alyssa greets players with a short dialogue once they enter the level.
Queen Alyssa: “Finally, someone to help my people. Guilty of nothing, save being loyal to me. They were cursed to be held in these cells beyond their natural lives. My blessing will allow you to free them from their long torment.”
With the Queen's blessing, the player proceeds to free the tormented souls. Once all six prisoners' souls are freed, the player is directed to the center of the map where they face the Warden.