is a massively multiplayer online role-playing game (MMORPG). It is Blizzard Entertainment's fourth game set in the fantasy Warcraft universe, first introduced by Warcraft: Orcs & Humans in 1994.World of Warcraft takes place within the world of Azeroth, four years after the events at the conclusion of Blizzard's previous release, Warcraft III: The Frozen Throne. Blizzard Entertainment announced World of Warcraft on September 2, 2001.
