Kingdom Hearts χ

Kingdom Hearts χ[chi] is a Kingdom Hearts game that is exclusive to PC browsers. The game is free to play, but includes additional purchasable items. Set during the events of the Keyblade War, it hosts simple 2D graphics and allows all players to become Keyblade wielders.

The closed beta test for Kingdom Hearts χ[chi] was held from March 22 to March 25, 2013. An open beta test started on the 8th of July and concluded with the official launch of the game service on the 18th of July.

On May 12, 2015, it was announced that Kingdom Hearts χ had been remade for iOS and Android smartphones as Kingdom Hearts Unchained χ.

Gameplay
Players are able to create their own unique characters in the same style and fashion originally present in Kingdom Hearts Mobile and Kingdom Hearts Re:coded's Avatar Menu. Battles consist of a strategic card-battling mechanic with a large emphasis on collecting cards and items. can also be synthesized to level and evolve stronger cards and materials can be synthesized to strengthen the Keyblade's abilities. All controls, including moving around the field and battling, use the mouse. While the game can be experienced in single-player, cooperative multi-player is an emphasized element as cooperative gameplay is required to defeat raid bosses, which appear several times throughout the day. Additionally, players go into five Unions in which players defeat enemies together to collect light known as "Lux". At the end of each week, the total amount of Lux for each team is calculated and the team that gathered the most, take part in a mission where players can obtain special rewards.

Action Points (AP)
AP, or Action Points, determine how much actions, such as opening chests, inspecting objects, and battling Heartless, the player can execute, each one consuming a determined amount of AP. Opening a a treasure chest, for example, costs 3 AP. If the player runs out of AP, they will not be able to take certain actions. AP can be replenished by consuming items, such as Potions, that replenishes 10 AP, or Mega-Potions, that replenishes all AP; leveling up; or by allowing time to pass.

Battle Points (BP)
BP, or Battle Points, are used to increase the damage the player deals to Raid Bosses. The first time the player enters in each Raid Boss screen, it can get a x4 multiplier for 0 BP, but after that, it will cost 3 BP, while a x2.5 multiplier will cost 2 BP, and a x1 multiplier will cost only 1 BP. BP can be replenished by consuming Ethers, that replenishes 1 BP, Mega-Ethers, that replenishes all BP, leveling up, and by allowing time to pass.