Blizzard Entertainment has created games.
Blizzard Entertainment , Inc. is an American video game developer and publisher based in Irvine , California , and is a subsidiary of the American company Activision Blizzard . The company originally concentrated primarily on the creation of game ports for other studios before beginning development of their own software in 1993 with the development of games like Rock n ' Roll Racing and The Lost Vikings . 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 .