A

• A Dark Omen
• A Field of Battle ~ Bitter (Ver. 2)
• A Memory of a Tragedy
• A New World
• A New World (No. 2)
• A Prelude to the Tragedy
• Albedo (Episode II song)
• Albedo (song I)
• Anxiety
• Assault
• Awakening

B

• Battle
• Battle of Elsa
• Battle of Elsa (Ver. 2)
• Battle's End
• Battleland
• Beach of the Void
• Bitter

C

• Chase
• Communication Breakdown
• Creeping Fear
• Creeping Into
• Crisis Coming

D

• Durandal (song)

E

• Escape
• Everyday

F

• Fallout
• Fatal Fight (Jin & Margulis)
• Fatal Fight (Ver. 2)
• Fate
• Febronia (No. 2)
• Febronia (song)
• Fighting KOS-MOS
• Final Crisis
• First Meeting
• Followed Space Shuttle
• Forgotten Sanctuary

G

• Game Over
• Gate Out
• Gnosis (song)
• Godsibb
• Green Sleeves

H

• Hepatica (KOS-MOS)
• Hepatica (No. 2)

H cont.

• Hepatica (No. 3) ~ I Believe in You
• Here He Comes
• Here He Comes (No. 2)
• Here She Comes (KOS-MOS)

I

• I Am Free
• I Love You, Sincerely
• Image Theme
• Image Theme (No. 2)
• In a Limestone Cave
• In the Beginning, There Was...
• In the Beginning, There Was... (Ver. 2)
• Inferno
• Inner Space
• Inside ~ Sakura (Ver. 3)
• Invasion Inside an Enemy Ship

J

• Jr. (No. 2)
• Jr. (No. 4)
• Jr. (song)

K

• Kokoro
• KOS-MOS (song)
• Kukai Foundation (song)

L

• Lamentation
• Last Battle
• Life or Death

M

• Margulis (song)
• Maybe Tomorrow ~ Ending Medley
• Mother, I Miss You

N

• Nephilim (song I)
• Nephilim (song II)

O

• On Our Ways
• Opening
• Opening Theme
• Ormus (song)
• Outrageous

P

• Pain
• Panic
• Presentiment ~ Jr. (No. 3)
• Prologue
• Promised Pain
• Proto Merkabah (song)

R

• R&D Report
• Relief
• Rolling down the U.M.N.

S

• Sadness

S cont.

• Sakura (song)
• Sakura (Ver. 2)
• Sakura (Ver. 4)
• She's Coming Back
• Shifting Territories
• Shion ~Emotion~
• Shion ~Memories of the Past~
• Shion's Crisis
• Song of Nephilim (song)
• Stars of Tears
• Starting Examination
• Strain ~ Jin
• Strained
• Strained (Ver. 2) ~ Albedo (Ver. 2)
• Surrounded
• Survive

T

• T-elos (song)
• T-elos (Ver. 2)
• Testament (song)
• The Battle of Your Soul
• The Girl Who Closed Her Heart
• The Harsh Truth
• The Miltia Incidents
• The Miracle
• The Resurrection
• Thoughts
• To the Last Place

U

• U-DO ~ Febronia
• U-TIC Facility (song)
• U.M.N. Mode

W

• Warmth
• We've Got to Believe in Something
• When the Grief Lets You Go
• When the Grief Lets You Go (No. 2)

X

• Xenosaga Episode I Original Soundtrack
• Xenosaga Episode II Original Soundtrack
• Xenosaga Episode III Original Soundtrack

Y

• Yasunori Mitsuda
• Yuki Kajiura

Z

• Zarathustra (song)
• Zarathustra Dangeon

Ω

• Ω