Blizzard Entertainment (lore)

Blizzard Entertainment is a games developer, responsible for IPs such as Diablo, StarCraft, Warcraft, Heroes of the Storm, and The Lost Vikings. Blizzard World was based on its IPs.

Trivia
The in-universe Blizzard is a form of in-universe representation for Blizzard Entertainment itself. A difference is that in the Overwatch universe, Blizzard never created Overwatch as a game.