Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Party Level 2 (10 points): Obtain party level 2.
Party Level 3 (10 points): Obtain party level 3.
Party Level 4 (10 points): Obtain party level 4.
Party Level 5 (10 points): Obtain party level 5.
Party Level 6 (20 points): Obtain party level 6.
Raindrops (10 points): Complete Chapter 1.
Revolution (10 points): Complete Chapter 2.
Fantaisie Impromptu (10 points): Complete Chapter 3.
Grande Valse Brilliante (10 points): Complete Chapter 4.
Nocturne (10 points): Complete Chapter 5.
Tristesse (10 points): Complete Chapter 6.
Heroic (10 points): Complete Chapter 7.
Heaven's Mirror (10 points): Complete Final chapter: Heaven's Mirror.
Hero's Gate (30 points): Use the Hero's Crest to open the way to Mysterious Unison.
Rondo's Return (50 points): Defeat Rondo in Mysterious Unison.
Claves's Resurrection (50 points): Collect all 7 pieces of Claves's Soul.
Grand Finale (70 points): Defeat Frederic with Claves unlocked.
Soul Released (79 points): Free Chord's Soul from Fort Fermata.
Pirate's Treasure (80 points): Finally obtain Dolce's treasure.
Xylophone Treasure (80 points): Use your orb to open the secret door in Xylophone Tower.
Score Piece Collector (100 points): Collect all 32 Score Pieces.
EZI Worshipper (321 points): Collect all EZI items in the game.