Activision Inc. is an American video game publisher based in Santa Monica, California. It was founded in 1979 and has been a subsidiary of Vivendi since 2013. The company's first product was the video game Pitfall!, which was one of the earliest console games to gain widespread popularity. Activision was one of the key players in the development of the early home console market, with a number of their games being released on the Atari 2600. In the 1980s, Activision released a number of successful games such as Kaboom! and Pitfall II: Lost Caverns. They also published a number of licensed games, such as the Ghostbusters series. In the 1990s, the company's focus shifted to the emerging PC market, with games such as Zork Nemesis and Tony Hawk's Pro Skater. In recent years, Activision has been one of the leading publishers of console games, with hit titles such as Call of Duty and Skylanders. They have also released a number of successful mobile games, such as Candy Crush Saga. The company is also known for their legacy systems, such as the Atari 2600 and Nintendo Entertainment System, on which a number of their classic games were released. In recent years, they have also produced a number of microconsoles, such as the Atari Flashback and the Sega Genesis Mini.