Kingdom Hearts Union χ

Kingdom Hearts Union χ, stylized as Kingdom Hearts Union χ[Cross], is a Kingdom Hearts game exclusive to the iOS and Android smartphone platforms. It is a sequel/update to Kingdom Hearts Unchained χ and a continuation of the story started in Kingdom Hearts χ.

Story
After being saved by Ephemer and Skuld following the conclusion of the Keyblade War, Player is brought to another realm, where the Dandelions have assembled as per Ava's instructions. Upon entering this new realm, however, Player and the Dandelions lose all memories of the past world, with the exception of the five wielders chosen to become the new Union leaders.

Following Ava's orders, Ephemer ventures to the the Keyblade Graveyard as one of the new Union leaders. Soon, Ephemer is joined by Skuld, the second of the new Union Leaders, much to his surprise. When Skuld questions the whereabouts of other three Union leaders, Ephemer admits that he had his doubts about becoming a Union leader. Ventus, the third Union leader, arrives and Ephemer and Skuld welcome him. While waiting for the fourth Union leader to appear, Ephemer and Skuld bond with Ventus, who voices his jealousy over Ephemer and Skuld's friendship since he has always been alone, though they assure him that they consider him a friend as well. Amused by the concept of friends, the fourth Union leader, Brain, appears and asks if Ephemer is meant to be their leader. Ephemer denies this, feeling as though they should wait until all of them are together to decide who leads. When Brain and Ventus express their reluctance about lying to the Dandelions about the Keyblade War, Ephemer thinks about the pain Player had to endure because of the war and firmly states that must follow Ava's rules so that no one has to remember the tragedy of the Keyblade War. Accepting this, the four new Union leaders await the arrival of their final comrade.

Meanwhile, Player resumes his missions, making use of the newly imposed Union Cross by joining a party of fellow Dandelions, and traveling to new worlds, such as the Castle of Dreams and Enchanted Dominion. Soon, Player has a nightmare in which they see themselves collapsed after the events of the Keyblade War, particularly their battle with Aced from just before the fated battle. Upon their defeat at Aced's hand, Player is jolted awake and Chirithy, concerned of frequency of Player's nightmares, advises them to rest. As Player warily returns to sleep, Chirithy bids them goodnight and continues to watch over them.

Prior to the Keyblade War, Strelitzia, another member of the Dandelions, takes note of Player as they wait for Ephemer at the Fountain Square, taking a keen interest in them when she returns to see them crying and clutching his Chirithy tightly. Over time, Strelitzia continues to see Player and feels drawn to them, though she is unable to speak with them herself. After witnessing Player's battle with Aced, Strelitzia is approached by Ava and asked to be one of the new Union leaders following the events of the Keyblade War. Concerned about those who will be left behind during the Keyblade War, Strelitzia remembers that Player is not a Dandelion, meaning that he will be one of those who is left behind, and insists that she has to warn Player of the danger that is to come. The next day, Strelitzia's Chirithy spots Player and leads her to an abandoned house, where the two of them are attacked by an unseen assailant, who steals Strelitzia's rule book before leaving. Streltzia holds her Chirithy in her arms, sad that she did not get the chance to see Player, before both she and her Chirithy fade away.

Ephemer, Skuld, Ventus, and Brain grow concerned when the fifth Union leader does not show up and begin searching the Keyblade Graveyard. Eventually, Lauriam approaches them and apologies for his late arrival, claiming to have been searching for something. Together at last, the five enter the Foretellers' Chamber in Daybreak Town, where Brain looks through a copy of the Book of Prophecies that he finds. Ultimately, they decide to keep the Unions united under a Union Cross for the time being, while also keeping the absence of the Foretellers a secret. Brain then decides that in order to celebrate, they should make creating new Spirits as their first task and sends Ephemer, Skuld, and Ventus to collect the supplies, while he and Lauriam prepare to synthesize the materials.

Gameplay

 * The game retains the gameplay found in Unchained χ, and all in-game data will be carried over.
 * Multiplayer is introduced. Players will be able to team up with up to five members of their Party and tackle special Quests together.