Blizzard Entertainment created World of Warcraft in 2005.
Blizzard Entertainment . Shortly thereafter , Blizzard released Warcraft : Orcs & Humans . Blizzard went on to create several other video games , including Warcraft sequels , the Diablo series , the StarCraft series , and in 2004 the massively multiplayer online role-playing game World of Warcraft . World of Warcraft ( WoW ) is a massively multiplayer online role-playing game ( MMORPG ) released in 2004 by Blizzard Entertainment .