Blizzard Entertainment, Inc. is an American video game developer and publisher based in Irvine, California, and a subsidiary of Activision Blizzard. Originally founded in 1991, the company is best known for producing the highly influential massively multiplayer online role-playing game World of Warcraft (2004), as well as the multi-million selling video game franchises Diablo, StarCraft and Overwatch. The company also operates Battle.net, an online gaming service. Founded as Silicon & Synapse, Inc.
https://en.wikipedia.org/wiki/Blizzard_Entertainment