Xenosaga Episode I: Der Wille zur Macht is a role-playing video game developed by Monolith Soft and released for the PlayStation 2 in 2002. It is the first installment in the Xenosaga series, which explores themes of philosophy, religion, and the nature of existence. Players control characters like Shion Uzuki and KOS-MOS as they navigate a sci-fi universe filled with complex narratives and turn-based combat. The game features a rich story that delves into the conflict between humans and the mysterious Gnosis, creatures that threaten humanity. Players engage in battles, solve puzzles, and experience cinematic cutscenes that advance the plot. The game is known for its deep lore and character development, setting the stage for subsequent episodes in the series.