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.
"Far away there is a World of fairy tales. It is a World filled with light. The light gave birth to many lesser worlds, and then embraced them. The source of light is Kingdom Hearts, and the key that protects it is the χ-blade. So long as it endured, it was believed that the World's light would shine eternal.
However, bright light casts shadows that beget darkness. Darkness brings anxiety and fear, awakening desire. Formerly hidden in the depths of the heart, darkness turns to chaos and begins to spread across the World. To halt the advancing darkness, those who desire light forge Keyblades in the image of the χ-blade and set out on an adventure across the World."
Players are able to create their own unique characters in the same style and fashion originally present in Mobile and Kingdom Hearts Re:coded'sAvatar Menu. Battles consist of a strategic card-battling mechanic with a large emphasis on collecting cards and items. Cards can also be synthesised 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 teams 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.