Dragon Sword 64 (USA) (Proto) (1999-08-25), or ドラゴンソード64 in Japanese, is a prototype action-adventure game developed and published by Nintendo for the Nintendo 64. It was first released on August 25, 1999. The game follows the story of a young swordsman named Ryudo, who is tasked with protecting a princess from an evil sorcerer. The game features a unique combination of action and adventure elements, with players controlling Ryudo as he traverses a variety of environments, battles enemies, and solves puzzles. The game also features a variety of weapons and items that can be used to aid Ryudo in his quest. Dragon Sword 64 is a unique game that combines elements of action and adventure games and is sure to provide an entertaining experience for players of all ages.