Xenosaga is a role-playing video game series developed by Monolith Soft and primarily published by Namco. Forming part of the wider Xeno metaseries, Xenosaga is set in a science fiction universe and follows a group of characters as they face both a hostile alien race called the Gnosis and human factions fighting for control of the Zohar, an artifact connected to a god-like energy called U-DO. Gameplay across the series is similar, with the characters being guided through a linear narrative and fighting enemies using a turn-based combat system. The party fights both on foot and in a variety of mechs.