Kingdom Hearts/Gameplay

Gameplay
Kingdom Hearts is influenced by its parent franchise, Final Fantasy, and carries gameplay elements over into its own action-based, hack and slash system. The main battle party consists of three characters: Sora, Donald Duck and Goofy. Sora is directly controlled by the player from a third person camera angle. All other party members are computer-controlled, though the player can customize their behavior to an extent through the pause menu. Donald and Goofy are the computer-controlled characters that are usable in most areas; nearly every world in the game features its own party member who can be chosen to replace Goofy or Donald in the party while the party is in that world. For instance, Jack Skellington can join the player's party in Halloween Town, but can not accompany the player elsewhere. On some worlds, the party changes its appearance, has abilities unique to that world, or both. For example, the party can fly in Neverland and has aquatic forms in Atlantica, which enable them to survive underwater.

Like many traditional role-playing games, Kingdom Hearts features an experience point system which determines character development. As enemies are defeated, the player gains experience which can lead up to a "level up", where the characters grow stronger and gain access to new abilities. Unlike other games of its type, Kingdom Hearts allows a certain degree of character development customization through a short tutorial found at the beginning of the game. The tutorial allows the player to select from one of three main attributes―strength, defense, and magic―for Sora to excel in and one to lack in. By choosing certain options, the player is able to manipulate how Sora learns abilities, grows statistically, and even gains levels. Donald, Goofy, and any other additional party members are assigned specific areas of strength from the outset. Donald excels in magic and Goofy excels in defense and special attacks.

The game is driven in a primarily linear progression to the next story event, usually told in the form of a cut scene, though there are numerous side quests available that provide bonus benefits to the characters. Most of the gameplay occurs on interconnected field maps where battles take place. Combat in Kingdom Hearts is in real time and involves pressing buttons to initiate attacks by the on-screen character. A role-playing game menu, similar to those found in Final Fantasy games, found at the bottom left of the screen provides other combat options such as using magic and items. There is also a context-sensitive option at the bottom of the menu, usually used for interacting with the environment or performing special attacks. This menu is manipulated by using the right analog stick or digital pad, while movement is controlled by the left analog stick, allowing the player to navigate the menu while avoiding or approaching enemies.

Gummi Ship
The Gummi Ship is the mode of travel between the various worlds in Kingdom Hearts where the player pilots a vessel. The gameplay for piloting the vessel is very different from the rest of the game as it switches to a rail shooter format. The player controls the Gummi Ship from a rear, third person perspective as it travels in an outer space setting. At the beginning of the game, there are few options available to customize the vessel, but as the game progresses, new weapons, engines, and armor become available for it. In addition, many different pre-designed blueprints can be found throughout the game which can be used to quickly construct gummi ships.

Setting
The universe of Kingdom Hearts is a collection of various levels, referred to as "worlds", which the player progresses through. Thirteen can be accessed throughout the game and one, the Disney Castle, is shown in cutscenes. Additional worlds are mentioned by various characters, but are not accessible because they have been destroyed by the Heartless, beings of darkness. Ten of the worlds are based on Disney fiction, primarily from the Disney animated features canon, and the other four were created by Square specifically for the game.

Each world varies in appearance and setting, depending on the Disney world upon which it is based. The graphics of the world and characters were meant to resemble the artwork style of the environments and characters from their respective Disney film. Each Disney world is inhabited by characters from their respective Disney film; Hercules and Philoctetes inhabit Olympus Coliseum, and Aladdin, Princess Jasmine, and Jafar inhabit Agrabah. Each world is disconnected from the others and exists separately. Most characters in the worlds are unaware of the existence of the other worlds, but some notable ones are aware. Players travel from one world to another via Gummi Ship.

The worlds created specifically for the game mirror the overall appearance of the other worlds and feature either new characters or characters from several Final Fantasy games. The new worlds include: Destiny Islands, where the story initially begins; Traverse Town, which serves as a launching point for most of the game; Hollow Bastion, which many of the Final Fantasy characters call home; and End of the World, a large, dark world created from the remnants of various worlds consumed by the darkness. The main characters travel from world to world to seal each "Keyhole"; this protects the world from the Heartless and ultimately from destruction. They also try to minimize their interaction with characters of other worlds in order to maintain a balance of separation. To blend in with the inhabitants of a world, Sora, Donald, and Goofy sometimes change their physical appearance.

Story
Kingdom Hearts begins on Destiny Islands, where Sora, Riku, and Kairi live. The three friends want to leave the islands to explore new worlds and have prepared a raft for this purpose. One night, the islands are attacked by darkness and shadow creatures—the Heartless. Sora seeks out his friends, finding Riku, who disappears into darkness. At the same time, Sora obtains the Keyblade. The islands are destroyed, and Sora is left adrift. Meanwhile, King Mickey has left his world to deal with the increasing darkness and left instructions for mage Donald and knight Goofy to find the "key".

Donald and Goofy use a Gummi Ship to travel to Traverse Town, to where Sora has drifted. Sora encounters the Heartless again, and meets Leon, who explains the Heartless are beings that consume hearts, and that the Keyblade is the only weapon capable of defeating them. A man named Ansem, the leader of Leon's home world, is said to have studied the Heartless. Sora meets Donald and Goofy and the three decide to travel together: Donald and Goofy to find Mickey, and Sora to find Kairi and Riku. The three go to various worlds based on Disney films, finding that the Keyblade also locks "Keyholes", passages the Heartless use to take the heart of a world. A group of Disney villains, led by Maleficent, seek out the seven Princesses of Heart to unlock the Keyhole that leads to Kingdom Hearts, a repository of knowledge and power and the source of all hearts. This group includes Riku, whom Maleficent promises she will help in finding Kairi. Maleficent sows distrust in Riku, telling him Sora has abandoned him and Kairi for new friends and the Keyblade. An increasingly antagonistic Riku finds Kairi's body, but cannot find her heart.

Sora and his friends eventually arrive at Hollow Bastion, the homeworld of Ansem and the headquarters of Maleficent. Riku takes the Keyblade from Sora, revealing him as the true Keyblade master and that Sora only received it in his absence. Donald and Goofy, taking their order to follow the "key" seriously, leave with Riku. Sora challenges Riku, stating his heart derives strength from his friends; his friends return to him, as does the Keyblade. In his shame, Riku meets a cloaked man who goads him to give into the darkness. The three engage and kill Maleficent but then meet a strangely-behaved Riku with a Keyblade that unlocks hearts. Sora finds Kairi's body and Riku, who reveals himself to be Ansem, possessing Riku's body. Ansem explains that Kairi is a Princess of Heart and her heart was trapped within Sora's body since the Destiny Islands were destroyed. After defeating Ansem, Sora uses Ansem's Keyblade to unlock his heart by impaling himself, releasing both his and Kairi's heart. Kairi's heart returns to her body, in turn completing the final Keyhole, while Sora becomes a Heartless. Sora is restored to human form by Kairi and resolves to confront Ansem.

Ansem is found in End of the World, the combined remnants of worlds taken by the Heartless. Ansem explains his belief that the nature of the heart revolves around darkness, and he seeks Kingdom Hearts, as that would be the ultimate darkness. However, upon opening the door to Kingdom Hearts, it reveals its light, overwhelming and destroying Ansem. Beyond the door are King Mickey and Riku, and they help Sora and the others close the door, as there are many Heartless beyond it. Mickey and Sora use their Keyblades to lock the door. The worlds lost to the Heartless reconstruct themselves, separating Sora and Kairi. The game concludes as Sora, Donald, and Goofy resolve to find Riku and Mickey.