アンチェインドキー ユニオンクロス キングダムハーツユニオンクロス KHx KHUX
Mobile phone (formerly browser-based) social RPG, eighth title and prequel of the [[KINGDOM HEARTS]] videogame series. Players are custom [[Keyblade]] wielders organized under five Unions. Various [[Disney]] worlds and characters return, and a wide variety of new [[Heartless (kingdom hearts)|]] are featured. The featurette [i][[kingdom_hearts_x_back_cover|KINGDOM HEARTS χ Back Cover]][/i] expands on events of this game.

h4. Versions
* [i]KINGDOM HEARTS χ[chi][/i] (Browser, 2013-2015)
* [i]KINGDOM HEARTS Unchained χ[/i] (Mobile, 2015-Present)
** [i]KINGDOM HEARTS Union χ[Cross][/i] (rebranded since 2017)

h4. Characters
* [[Chirithy]]
* [[Ephemer (Kingdom Hearts)|]]
* [[Skuld (Kingdom Hearts)|]]
* [spoiler][[Ventus (kingdom hearts)|]][/spoiler]
* [spoiler][[Brain (Kingdom Hearts)|]][/spoiler]
* [spoiler][[Lauriam]][/spoiler]
* [spoiler][[Strelitzia (Kingdom Hearts)|]][/spoiler]
* [spoiler][[Elrena]][/spoiler]
* [spoiler][[Maleficent]][/spoiler]
* [spoiler][[Darkness (Kingdom Hearts)|]][/spoiler]
[b]Foretellers[/b]
* The [[Master of Masters]]
* [[Ira (Kingdom Hearts)|]]
* [[Aced (Kingdom Hearts)|]]
* [[Invi (Kingdom Hearts)|]]
* [[Gula (Kingdom Hearts)|]]
* [[Ava (Kingdom Hearts)|]]
* [[Luxu (Kingdom Hearts)|]]
kingdom hearts x