Blizzard Entertainment is a video game developer and publisher that was founded in 1991 and is now a subsidiary of Activision Blizzard. As a subsidiary, Blizzard operates under an integrated model where it creates and sells popular franchises like World of Warcraft, Diablo, and StarCraft, while Activision Blizzard owns both Blizzard and Infinity Ward but does not develop games itself. While Blizzard is famous for its MMORPG World of Warcraft, it faces competition from free-to-play MMOs like Star Wars: The Old Republic, RuneScape, and Guild Wars 2.