Kingdom Hearts (キングダム ハーツ, Kingudamu Hātsu^?) is a series of action-adventure role-playing games developed and published by Square Enix. It is a collaboration between Square Enix and Disney Interactive Studios, and is under the direction of Tetsuya Nomura, a longtime Square Enix character designer. Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. The series features an all-star voice cast, which includes many of the Disney characters' official voice actors and well-known celebrities such as Haley Joel Osment, David Gallagher, Jesse McCartney, Hayden Panettiere, Mark Hamill, Christopher Lee and Leonard Nimoy. Characters from Square Enix's Final Fantasy series make appearances and interact with the player and the Disney characters. The series centers around the main character Sora's search for his friends and his encounters with Disney and Final Fantasy characters on their worlds, though the most recent games have centered around other characters.
The series currently consists of seven games including remakes across different video game platforms, and future titles are planned. Most of the games in the series have been both critically acclaimed and commercially successful, though each title has seen varying levels of success. As of September 2008, the Kingdom Hearts series has shipped over 12.0 million copies worldwide, with 2.0 million copies in PAL regions, 3.0 million copies in Japan, and 5.6 million copies in North America.^[1][2][3][4] A wide variety of related merchandise has been released along with the games, including soundtracks, figurines, and companion books. In addition, the series has been adapted into a manga and novel series.

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