World of Warcraft is the first online game produced by Blizzard Entertainment, a famous game company, which belongs to a massively multiplayer online role-playing game.

The game is based on the plot of the real-time strategy game "Warcraft" produced by the company. Relying on the historical events and heroes of Warcraft, World of Warcraft has a complete historical background timeline.

After the release of warcraft 3: Frozen Throne in 2003, Blizzard Entertainment officially announced the development plan of World of Warcraft (which has been secretly developed for several years). World of Warcraft was released in North America in 2004, and was released in the United States, New Zealand, Canada, Australia and Mexico on123 October of the same year. By the end of 2008, there were more than 1 1.5 million paying users in World of Warcraft.