Folklore, or FolksSoul in Japan (formerly Monster Kingdom: Unknown Realms, Unknown Realms) is a video game for the PlayStation 3 announced at E3 2006 which is told to be "The next generation of dark fantasy." The game is a real time action adventure game with RPG elements, in the same vein as Genji and Devil May Cry. The game stars a young blonde girl named Ellen, and a journalist named Keats. Together they must fight the monsters known as the "Folk" and weaken and capture their souls.

Disc 01
1. Journey's Beginning
2. Door of Mystery
3. Odd Borderline
4. Loneliness
5. Preparation
6. Awakening
7. Rumble
8. Mystery
9. Waltz of Fairies
10. Crisis
11. Coming from Myths
12. Scattered Flower
13. Voices from the Past
14. Long forgotten surfaces
15. Intersecting Spirit
16. An Endless Battle
17. Threat
18. Avalon

Disc 02
1. Breath of Ancient Times
2. Strategy
3. Impact
4. Tragedy coming
5. Pantheon
6. Meddling History
7. Ordeal
8. The Serpent Dragon's Lair
9. Sorrow
10. Distant Memory
11. A Village which was Forgotten
12. IRISH LULLABY
13. DANNY BOY
14. Between Life and Death
15. Rest

Disc 03
1. Into a world still unknown
2. Interrupted
3. Pennfield Map
4. Judgement Hall
5. Courtroom
6. The judged and the one who judges
7. End of a Memory
8. Confrontation
9. The Darkness Within
10. Truth
11. Determination
12. Shooting Star
13. The King's Vessel
14. Spear of a Champion
15. Metamorphosis
16. Fearing those which we should not
17. The Beginning of the End
18. Collapse
19. Destination of a Soul