Skill Point Bonus
Loading the clear data from Xenosaga1, you can receive more skills points
depending on character levels. The normal begining skill point is 600 + (level
of character) times 30. So if your characters are lvl99 in Xenosaga1, you can
get 3570Skill points! WHAM!

Clear Data
Win the game and it will ask you to make a clear data. By loading the clear
data you will start at the Save Plate in the Elza with Hakase/Professor blocking
the way. This will also unlock dungeons and events with this. Data from other
Xenosaga games on your memory card will unlock new features when you start a
game.

Get Bathing Suits
Load a save file that's been beaten from the 1st Xenosaga game or Xenosaga
Reloaded to unlock bathing suits for Kos-Mos and Ziggy.

Completion bonus
Win the game and create a cleared save game when
prompted. Load the cleared saved data to begin the game at the Save
Plate in the Elza. New dungeons and events will be unlocked.

Bonus features
Have a saved game from Xenosaga: Episode 1 or Xenosaga 1: Reloaded
to unlock KOS-MOS' and Ziggy's swimsuits when begining a new game.
Have a completed saved game from Xenosaga Freaks to unlock The
Doctor's (Hakase) special sub-event.