The game was developed and released on August 2, 2001 by Bandai.
While the Straw Hat Pirates are peacefully sailing, the Going Merry is suddenly attacked by an unknown ship belonging to an unseen enemy. What happens during the attack is unknown but it scatters the crew leaving Usopp alone on the Going Merry. Around the same time, a young pirate named Yuta is inspired by Luffy and decides to set sail with Ryuji and Reika as the Gejitsu Pirates in search of a Mysterious Treasure. The Gejitsu Pirates eventually encounter Usopp who convinces them to sail with him as he happens to own a piece of the Mysterious Treasure. Together they set out on an adventure to find the lost Straw Hat Pirates and race against the enigmatic Skullface, the man responsible for the attack, who is also searching for the Treasure.
The main gameplay revolves around sailing the Going Merry, visiting recognizable locations like Cocoyashi Village and the Baratie. Sailing involves using cannonballs to destroy obstacles and enemy ships, belli and cards of various characters, and managing the crew's food supply. While sailing, players will encounter enemy crews sometimes supported by notable characters such as Alvida, Eric, Yosaku, etc.
Unlike other One Piece games, the Straw Hat Pirates are not controlled directly outside of story events where the player makes decisions such as Zoro dueling an impostor and Sanji fighting Arlong. Since the Straw Hats mainly act as support, during battles, the player controls the Gejitsu Pirates.
Crew fights are turn-based with the player attacking using a card system similar to a roulette wheel with the player picking cards to deal damage. Picking cards at the right time allows more cards to be chosen and thus do more damage and/or allow the current supporting character to unleash a special attack. Battles end when all three members of either crew are eliminated from the fight with the player gaining belli if victorious.
During certain story events, the player will engage enemy ships in naval combat which takes place in first-person. The player takes turns shooting down the cannonballs launched by the enemy and counterattacking by shooting specific points on the opposing ship. When the enemy ship is defeated, the story will advance and may be proceeded by a fight against the enemy crew supported by their leader.