Kingdom Hearts

• 1. A Kingdom of Hearts

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  Kingdom Hearts began with a conversation between two Square employees sharing an elevator. Shinji Hashimoto and Tetsuya Nomura found themselves talking about what it might look like to blend Square's role-playing games with the worlds of Disney. That casual exchange eventually became one of the most commercially successful crossover franchises in gaming history, shipping more than 36 million copies worldwide as of March 2022. Nomura went on to direct the series, a position he had never held before when the first game launched in Japan on the 28th of March 2002. Thirteen games now make up the series, available across multiple platforms, with more planned. The question the franchise set out to answer was simple and strange at once: what happens when Sora, a teenage boy from Destiny Islands, picks up a weapon shaped like a key and steps into the worlds of Disney films?

• 2. The First Keyblade

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  Sora, Kairi, and Riku were introduced to players in the first Kingdom Hearts game, released for the PlayStation 2. The game established the central mythology around "hearts" and dark creatures called Heartless, and placed Disney characters alongside Final Fantasy cameos in a way no game had tried before. The North American release on the 17th of September 2002 included additional content absent from the original Japanese version. Japan received that content back in a re-release called Kingdom Hearts Final Mix on the 26th of December 2002, which added enemies, cutscenes, and weapons. The direct sequel, Kingdom Hearts: Chain of Memories, arrived on the Game Boy Advance in Japan on the 11th of November 2004, introducing card-based combat where players assembled decks to trigger attacks and magic in real time. That game was later remade for the PlayStation 2 as Kingdom Hearts Re:Chain of Memories, packaged alongside Kingdom Hearts II Final Mix in Japan on the 29th of March 2007. Kingdom Hearts II itself had arrived for the PlayStation 2 in Japan on the 22nd of December 2005, adding a new enemy class called Nobodies and a Reaction Command system for reflex-driven moments in battle.

• 3. Branching Across Platforms

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  After Kingdom Hearts II, the series expanded in every direction at once. Kingdom Hearts 358/2 Days reached the Nintendo DS in Japan on the 30th of May 2009, focusing on Roxas and his time inside Organization XIII, and was the first game in the series to offer cooperative multiplayer. Kingdom Hearts Birth by Sleep landed on the PlayStation Portable in Japan on the 9th of January 2010, revealing the origins of the villain Xehanort in a story set ten years before the first game; it carried four scenarios, three following protagonists Terra, Ventus, and Aqua. Kingdom Hearts 3D: Dream Drop Distance followed on the 29th of March 2012 for the Nintendo 3DS in Japan, centering on Sora and Riku's Mark of Mastery exam. Mobile entries arrived too: Kingdom Hearts Coded ran as an episodic mobile game in Japan from November 2008 through January 2010 before being remade for the DS as Kingdom Hearts Re:coded, which launched internationally in late 2010 and early 2011. A browser game, Kingdom Hearts Chi, was playable only in Japan from July 2013 to September 2016. Its international port, Kingdom Hearts Unchained Chi, reached Android and iOS devices starting in Japan on the 3rd of September 2015 and North America on the 7th of April 2016, before eventually being rebranded as Kingdom Hearts Union Chi and later Kingdom Hearts Union Chi Dark Road. That app was shut down and converted into a cutscene viewer in May 2021 and delisted in August 2024.

• 4. The Long Road to Kingdom Hearts III

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  In September 2010, Nomura publicly acknowledged that his team was too occupied with other projects, including what was then called Final Fantasy Versus XIII, to begin serious work on Kingdom Hearts III. The franchise's third mainline chapter did not get its public debut until the 10th of June 2013, when Nomura presented a teaser at the E3 Sony press conference confirming development for the PlayStation 4. An Xbox One version was announced the following day. Kingdom Hearts III concludes the narrative arc called the Dark Seeker Saga, which spans the entire original series and revolves around the antagonist Xehanort. The game was released on the 25th of January 2019 in Japan and on the 29th of January worldwide. A version bundled with the Re Mind downloadable content launched on Windows exclusively via the Epic Games Store on the 30th of March 2021, arriving on Steam three years later on the 13th of June 2024. A Nintendo Switch cloud version released on the 10th of February 2022 as part of the series' 20th anniversary celebration. Nomura noted in January 2020 that there would need to be "more time" before the next main entry, and in April 2022 Square Enix confirmed Kingdom Hearts IV was in development, set in a realistic world called Quadratum inspired by Tokyo.

• 5. Music and the Hikaru Utada Connection

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  Yoko Shimomura composed the music for the series, with Kaoru Wada arranging orchestral renditions performed by the New Japan Philharmonic Orchestra and the Tokyo Philharmonic Orchestra. The main vocal themes, however, came from Japanese singer Hikaru Utada, the only artist Nomura had in mind for the first game. Kingdom Hearts marked the first time Utada had ever created a song specifically for a video game. The three principal themes are "Hikari" from Kingdom Hearts, "Passion" from Kingdom Hearts II, and "Oath" from Kingdom Hearts III, each paired with an English counterpart: "Simple and Clean", "Sanctuary", and "Don't Think Twice" for North American and European releases. On the weekly Oricon charts, "Hikari" reached number 1 in 2002, while "Passion" reached number 4 in 2005. The fights against the optional boss Sephiroth across the series feature a modified version of Nobuo Uematsu's "One-Winged Angel" from Final Fantasy VII.

• 6. Worlds Within Worlds

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  Nomura designed the series around the idea that each playable world should reflect the visual style of its source Disney film and keep its characters in their established roles. Hercules and Philoctetes appear in Olympus Coliseum; Aladdin, Princess Jasmine, and the Genie inhabit Agrabah. A world based on The Jungle Book was considered for the first game but cut because it resembled Deep Jungle from Tarzan too closely. A Lion King world was planned for the original game but required quadrupedal character models the engine could not process; the technology was ready by Kingdom Hearts II. Nomura included Space Paranoids, modeled after the 1982 film Tron, after seeing a Disney employee working on Tron 2.0, designing it to feel like an old computer game. Within the series' original locations, Scala ad Caelum, revealed in Kingdom Hearts III as the ancient seat of Keyblade master power, was also where Eraqus and Xehanort trained in their youth. Birth by Sleep introduced Castle of Dreams, Enchanted Dominion, Dwarf Woodlands, and Deep Space, while Kingdom Hearts III added Kingdom of Corona, San Fransokyo, Toy Box, Monstropolis, and Arendelle. The cancelled game Kingdom Hearts Missing-Link had been set to return to Scala ad Caelum before Square Enix ended the project on the 14th of May 2025.

• 7. Beyond the Games

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  Shiro Amano adapted Kingdom Hearts into manga form, serialized in Monthly Shonen Gangan; the first collected volume arrived in Japan in October 2003. Tokyopop brought it to the United States two years later in October 2005, and Yen Press now holds the US publishing rights. The manga series spans five adaptations: four volumes for the first game, two for Chain of Memories, ten for Kingdom Hearts II, five for 358/2 Days, and an ongoing serialization for Kingdom Hearts III in Gangan Online as of April 2019. A parallel light novel series written by Tomoco Kanemaki and illustrated by Amano divides Kingdom Hearts into two volumes subtitled "The First Door" and "Darkness Within", with the Kingdom Hearts II novels split across four volumes. A television pilot commissioned by Disney Channel in 2003 never went to series; its director, Seth Kearsley, uploaded the animatic to his personal YouTube channel in October 2022, revealing that the original game's voice cast had reprised their roles except for Haley Joel Osment, who was replaced by Bobby Edner due to scheduling conflicts. Kearsley noted the pilot tested well with audiences, but Disney chose not to continue due to the franchise's ongoing expansion. On the 27th of May 2020, reports emerged that a Disney+ series was in development, and on the 24th of April 2024, reports suggested the project had shifted to a theatrical animated film, though nothing had been officially confirmed at that point.