Blizzard Entertainment is an American video game developer and publisher founded in 1991 that is now owned by Activision Blizzard. As a subsidiary, Blizzard develops games under its own name while being owned and funded by Activision Blizzard. Some of Blizzard's most famous franchises are World of Warcraft, Diablo, and StarCraft. While World of Warcraft is one of the largest massively multiplayer online role-playing games, Blizzard faces competition from free-to-play games such as Star Wars: The Old Republic, RuneScape, and Guild Wars 2 which are developed and published by different companies.