It was announced in February 2021 that Kingdom Hearts Union χ Dark Road would be shutting down its online features and transitioning into an offline app, starting with Union χ in May 2021 and Dark Road in August 2022. It was rebranded once again in June 2020 to Kingdom Hearts Union χ Dark Road with the release of the standalone game Kingdom Hearts Dark Road, the thirteenth installment in the series.
In April 2017, Unchained χ was rebranded as Kingdom Hearts Union χ. A version of the game for mobile devices called Kingdom Hearts Unchained χ was released as the ninth installment of the series in Japan in September 2015, and worldwide in 2016. Gameplay involves players navigating a customized avatar through Disney-inspired worlds fighting enemies, along with taking down bosses in multiplayer matches in competition with other teams. Kingdom Hearts χ, stylized as Kingdom Hearts χ, is a Japanese role-playing browser game developed by Square Enix (in collaboration with Disney Interactive Studios), BitGroove and Success, and published by Square Enix for web browsers as the eighth installment in the Kingdom Hearts series.