Activision Blizzard, Inc., through its subsidiaries, publishes online, personal computer (PC), console, and hand-held games worldwide. The company develops and publishes video games, as well as maintains its proprietary online-game related service, Battle.net. It also publishes interactive software products and peripherals internationally. The company's products cover various game categories, including action/adventure, action sports, racing, role-playing, simulation, first-person action, music, and strategy. Its products include Guitar Hero, Call of Duty, Tony Hawk, Spider-Man, X-Men, James Bond, and Transformers, as well as Diablo, StarCraft, Warcraft, and World of Warcraft. The company is based in Santa Monica, California. Activision Blizzard, Inc. is a subsidiary of Vivendi S.A.