Lore Compendium These posts will be updated frequently, feel free to let me know if I forgot anything or if you disagree with something. This is meant as a comprehensive compilation of all the Diablo lore, also pointing out inaccuracies and contradictions. Complete Timeline Unanswered Questions Contradictions/Changes Novelized Timeline The first step is establishing a chronology and find all the source which give information on each event. The Dawn  The Great/Eternal Conflict ,, The Sin War ,, The Mage Clan Wars , The Dark Exile , The Binding of the Three ,, From the capture of Diablo up to his Awakening , From the Awakening of Diablo up to its defeat , From the Dark Wanderer up to the Shattering of the Worldstone ,, From the Explosion of Mount Arreat up to when a Meteor Falls on the Tristram Cathedral , From when a Meteor Falls on the Tristram Cathedral up to the end of Diablo III , Book of Cain Diablo I Game/Manual Diablo II Game/Manual Diablo II: LoD Game/Manual Diablo III Beta Diablo III Game/Manual The Order Sword of Justice The Sin War Trilogy Other Sources Then let's list all the books in chronological order. The Book of Cain Covers most of the history of Sanctuary from the creation of the universe to recent times. The Sin War Trilogy (Birthright/Scales of the Serpent/The Veiled Prophet) Occurs 3000 years before the darkening of Tristram. Follows the story of Uldyssian. Demonsbane Occurs during year 302. Mentions of Arkaine and Horazon are made. The Black Road Spans over a year. Begins after the war between Tristram and Westmarch and ends after Tristram has been destroyed. Legacy of Blood Occurs in the weeks before the Dark Wanderer reaches Lut Gholein. The Kingdom of Shadow Spans over a couple of weeks. No precise hints are made about when the story occurs. Still we can assume, from Diablo's brief appearance at the end of the book, that a that time Diablo was back in the Burning Hells. So the story takes place after Mephisto has been defeated and while Diablo is in his sanctum. Moon of the Spider Takes place shorty after the destruction of the Worldstone. The story is a sequel to The Kingdom of Shadow. The Order Cover most of the 20 years between Diablo II and Diablo III. It might also be useful to list all the major realms Pandemonium Pandemonium Fortress Worldstone (Eye of Anu) High Heavens Chamber of the Council Crystal Arch (Anu's spine, place angels spawn from) Diamond Gates Silver City Burning Hells Black Abyss Hellforge Tathamet's husk (place demons spawn from) Sanctuary The Afterdeath The Void The Beyond (1) Trag'Oul's Realm The Pearl (2) Realm in which Anu rests (3) All the other worlds which the likes of Trag'Oul are sentinel over. (1) Realm Trag'Oul reveals to Uldyssian to unleash his power into, it's never explicitly named. (2) The Pearl no longer exists, it was the place where Anu and Tathamet engaged in battle. (3) Is said to be beyond this universe, could be considered to be another reality. Nothing else is known of the paradise Anu passed into. A list of all the major characters (this list will probably get incredibly long and may have its own post/thread in the future) High Heavens Angiris Council Auriel Imperius Itherael Malthael Tyrael Others Hadriel Inarius (once advisor to the Angiris Council) Izual Burning Hells Prime Evils Baal Diablo Mephisto Lesser Evils Andariel Azmodan Belial Duriel Others Astrogha Lilith Lucion Sanctuary Nephalem Bul-Kathos Esu Helgrotha Rathma (Linarian) Vasily Mage Clan (The Horadrim and the Yshari are not included as they are temporary orders/organizations) Ammuit (illusion magic) Ennead (alchemy, enchantments, alteration, transmutation) Harakas Sarandesh Taan (Skatsimi rites) Vizjerei (demonic conjuration and summoning, then later elemental magic) Zann Esu (elemental magic) Horadrim Deckard Cain (1) Jered Cain Nor Tiraj (Vizjerei mage) Tal Rasha Zoltun Kulle (Vizjerei or Ennead mage) Vizjerei Bartuc Horazon Vischar Orous Others Abd al-Hazir Adria Archbishop Lazarus Lam Esen Leah Kalan (Mendeln ul-Diomed) King Leoric Prince Aiden Prince Albrecht Uldyssian ul-Diomed Others Anu Tathamet Trag'Oul (1) Not actually a Horadrim as the order dissolved some time after the Prime Evils were captured and before he was even born, but the last descendant of the order. Here is a list of all the lore source, along with the degree of authority that should be given to each one. Diablo III Game/Manual [Ultimate Authority] Book of Cain [Sourcebook. High authority] The Sin War Trilogy (Birthright, Scales of the Serpent, The Veiled Prophet) [Novels. High authority] The Order [Novel. High Authority] Sword of Justice [Comic. High Authority] Diablo III Beta [High Authority] Diablo II: LoD Game/Manual [High Authority] Diablo II Game/Manual [High Authority] Diablo I Game/Manual [Normal Authority] Diablo Archive (Legacy of Blood, The Black Road, Kingdom of Shadow, Demonsbane) [Novels. Low Authority] Moon of the Spider [Novel. Low Authority] Tales of Sanctuary [Comic, Low Authority] The Arreat Summit [Normal Authority] Diablo Battle.net Website [High Authority] Diablo Blizzard Website [High Authority] Diablo D&D Material (Awakening, Diablerie, To Hell and Back, Fast Play, The Secret Cow Level) [Very Low Authority] Hellfire Game/Manual [Lowest Authority] Ultimate Authority: If contradictions occur this is considered to be the categorical truth. High Authority: Reliable lore source, most information coming from this source is cannon. Normal Authority: Some fact have been retconned but the majority is still cannon. Low Authority: Not considered cannon but may contain stories, information, and even bits and pieces that may indeed hold true. Very Low Authority: Not considered cannon. Info provided by those is probably correct unless anything else contradicts them, should only be used to provide background information. Lowest Authority: Nothing in it should be considered as truth, may be used to add some background information.