Dragon Quest IV: Chapters of the Chosen , known as Dragon Quest: The Chapters of the Chosen in Europe and originally published as Dragon Warrior IV for the North American NES version, is a role-playing video game and the fourth installment of the Dragon Quest video game series. Dragon Quest IV offered several new features over the first three titles, while carrying on many of those introduced in the previous games. Similar features included are the day and night cycles, the ability to travel via ship and a flying vehicle (this time, a hot air balloon), and the three levels of keys. They are Thief, Magic and Ultimate (originally localized as Final). There are also travel doors, which allow the party to move a great distance on the world map with little travel. Unlike the Hero in Dragon Warrior III, the Hero of Dragon Quest IV is not required to be in the party at all once the wagon becomes available. Despite this, the Hero is again the character that possesses the most powerful healing and attack spells. Many spells, weapons, armor, and shops (including the vault/bank) function the same as in past games. Saving the game was made easier by allowing one to save a game in a House of Healing, rather than talking to a king. Also, the save ("Confession" in the DS remake) and EXP point to the next level-up ("Divination" in the DS remake) are now separate commands. Returning to the format of the original North American Dragon Warrior, programmers allowed users to open a door using a command appearing in the top level of the menu (rather than requiring users to search through various characters' inventories for the key as in some previous games). The only requirement was that at least one character in the party needed to have an appropriate key in his or her inventory. Since this command was added, an unlocked door was added in this game, as well as large Castle Doors. However, this command was eliminated in later games and the remake, in which doors can be opened by attempting to walk through them.