Blizzard Entertainment
On November 23, 2004, Blizzard released "World of Warcraft", a massively multiplayer online role-playing game. "World of Warcraft" is the fourth released game set in the fantasy "Warcraft" universe, which was first introduced by "" in 1994. Blizzard announced "World of Warcraft" on September 2, 2001. The game was released on November 23, 2004, on the 10th anniversary of the "Warcraft" franchise.
World of Warcraft
To mark the release of "Hearthstone", Blizzard released the Hearthsteed mount for "World of Warcraft" players. The mount is obtained through winning three games in Arena or Play mode. Widely advertised on various "World of Warcraft" websites, this promotion encourages "World of Warcraft" players to try "Hearthstone" and marked the first significant crossover implemented between Blizzard games.