The game inspired the Kingdom Hearts Unchained χ smartphone game, which Square Enix released in Japan in September 2015 and then released in North America in April 2016.
Square Enix originally released the Kingdom Hearts χ (“chi”, pronounced “key”) PC browser game in 2013, and the game ended service in September 2016.
Square Enix released the Kingdom Hearts III game in January 2019 in Japan and the West for the PlayStation 4 and Xbox One.
Square Enix had teased the game as one of two projects with active teams besides the ones working on Kingdom Hearts III and Kingdom Hearts Union χ.