Intro/Opening Theme: "Somnus (Instrumental Version) - Final Fantasy XV - Musecore User moomin6250 https://musescore.com/user/15713316/scores/3372681
Battle Win Theme: "Game Over....Continue??" - Final Fantasy VII - Nobuo Uematsu - Musecore User Louis7864
Jungular Area Theme: "Battle Tower - Battle Theme" - Pokemon Sword and Shield - Musecore User GMA SheetMusic
Reginald Area Theme: "String Quartet No. 15 in D minor K421" - Wolfgang Amadeus Mozart - Musecore User Atimony12
Morskire Area Theme: "Khazad Dum Theme" - Lord of the Rings - Transcription by Oliver Khan
https://okmusiccouk.files.wordpress.com/2022/09/khazad_ducc82m_theme.pdf
Kaldorthin Area Theme: "Vordt of the Boreal Valley" - Dark Souls III - Flat User Alton McKillop
https://flat.io/score/5dd6a46e9e696a3baf85e4b0-dark-souls-iii-vordt-of-the-boreal-valley
Azhagul Area Theme: "Order" - Ultrakill - Musecore User d34db34t
Final Boss Area Theme: "The Only Thing They Fear Is You" - Doom Eternal - Mick Gordon - Musecore User Marco Loberto
Freeze Sound Effect https://www.soundjay.com/ice-sound-effect.html#google_vignette
All other sound effects https://mixkit.co/