Darkness of the Unknown

"Darkness of the Unknown" is a musical composition by Yoko Shimomura that appears in the. It is one of the boss themes of Xemnas.

Kingdom Hearts II

 * Battles
 * The World that Never Was:
 * Cavern of Remembrance: Xemnas's Replica Data


 * Cutscenes
 * The World that Never Was: "Naminé and Roxas", "The Depths of Oblivion", "To End It All", "The Final Battle"

Kingdom Hearts Union χ

 * Medals

Kingdom Hearts III

 * Cutscenes
 * Keyblade Graveyard: "The Last Light"

Kingdom Hearts III Re Mind

 * Cutscenes
 * Keyblade Graveyard: "Long Awaited Showdown", "Roxas's Heart", "The Final Key"

Kingdom Hearts Melody of Memory

 * Cutscenes
 * "KINGDOM HEARTS II: Chapter 4"

Albums
 File:Kingdom Hearts II Original Soundtrack Cover.png|Disc 2, Track 32 in the Kingdom Hearts II Original Soundtrack File:Kingdom Hearts Original Soundtrack Complete Cover.png|Disc 6, Track 10 in the Kingdom Hearts Original Soundtrack Complete File:Kingdom Hearts HD 2.5 ReMIX Original Soundtrack Cover.png|Disc 4, Track 11 in the Kingdom Hearts HD 2.5 ReMIX Original Soundtrack File:Kingdom Hearts 10th Anniversary Fan Selection -Melodies & Memories- Cover.png|Disc 1, Track 24 in the Kingdom Hearts 10th Anniversary Fan Selection -Melodies & Memories- 