Sword of Mana, originally released in Japan as Shin’yaku: Seiken Densetsu (新約しんやく 聖剣伝説せいけんでんせつ, lit. A New Testament: The Legend of the Sacred Sword), is a 2003 action role-playing game developed by Square Enix and Brownie Brown and published by Square Enix and Nintendo for the Game Boy Advance. It is an enhanced remake of the first game in the Mana series, the Game Boy game Seiken Densetsu: Final Fantasy Gaiden, which was released as Final Fantasy Adventure in North America and as Mystic Quest in Europe. Sword of Mana was the fifth release in the series. Set in a high fantasy universe, the game follows an unnamed hero and heroine as they seek to defeat the Dark Lord and defend the Mana Tree from enemies who wish to misuse its power.

While incorporating gameplay elements from the original game and generally following the same plot, Sword of Mana has new gameplay mechanics and a much more involved story. It removes elements of the Final Fantasy series present in the original game as a marketing ploy, while adding in gameplay elements and artistic styles from later games in the series. The plot is modified to allow the player to follow the parallel stories of either the hero or the heroine, and the backstory and dialogue is expanded from the original. Sword of Mana was produced by series creator Koichi Ishii, directed by Takeo Oin, and largely developed by employees of Brownie Brown who had previously worked on the series for Square.