Xenosaga I & II is a role-playing game for the Nintendo DS that serves as a remastered version of Xenosaga Episode 1 and Episode 2. Developed under the guidance of the series creator, it features significant alterations to the narrative, including new characters and modified scenarios. The perspective shifts primarily from Jr. to Shion in Episode 2, with various character fates altered and dungeons modified or removed. Additionally, the combat system is revised to ensure consistency between episodes.
Xenosaga I & II is a combined remake and retelling of Xenosaga Episode 1 and 2 redesigned for the Nintendo DS. The story changes were handled by the creator of the series.
The game changes large parts of the storyline in Episode 1 while following the elements established in the original game. This includes adding new characters and changing how some scenarios play out.
Changes in Episode 2 were much larger as the main character perspective of the game was switched from Jr. to Shion to match up with Episode 1 and 3. Some characters are removed from the story or have their fates changed or revealed. Some dungeons are removed, edited, or replaced.
It also answers some questions that the original did not as you follow a different path through the same overall story. It also changes the combat mechanics of Episode 2 to match Episode 1.