The story of Ziggy was always part of series creator
Tetsuya Takahashi's plan for the
Xenosaga project, but Monolith Soft had yet to decide in what form it should be presented. The team was contacted by the mobile development division of series publisher
Namco, asking whether Monolith Soft could work with them on a mobile property, and agreed to the collaboration, using the mobile game to tell Ziggy's story; Namco Mobile developed the game, while Monolith Soft handled story development. External studio Tom Create helped develop the game. The creation of
Pied Piper formed part of a move by the newly-established lead developers of
Xenosaga to expand the series into other media following the release of
Episode I. The game's script was co-written by series creators
Tetsuya Takahashi and his wife
Soraya Saga.
Pied Piper was Saga's last contribution to the
Xenosaga series prior to leaving the project in 2005. The game's title is a reference to the German fable of the
Pied Piper of Hamelin.
Pied Piper was first announced in July 2004. The game was originally published exclusively for
Vodafone devices, The third video game release in the
Xenosaga series, the game is one of two games to remain exclusive to Japan. A fan-translated video walkthrough was created in 2023. In 2025, a copy of
Pied Piper, along with the mobile RPG
Lost Chronicle, was found by an anonymous donor and preserved online; an English fan translation is in development. On April 16, 2026,
G-Mode announced in their sixth-anniversary stream that they would re-release the game on
Nintendo Switch and
Steam under their
G-Mode Archives+ label on April 30, 2026. ==Notes==