Mittsies - Alchemy (Helltaker Soundtrack)

KEYGEN CHURCH - Tenebre Rosso Sangue (UltraKill P-2 theme)

Traveler of Storms

Hollow Knight - Sealed Vessel

As seen in the Terraria Overhaul when fighting the Wall of Flesh and The Twins.

Terraria Overhaul Boss 2 (beta mix)

From game "Hollow Knight" of Free DLC "Grimm Troupe", the theme only plays when fighting "The Troupe Master, Grimm".

Hollow Knight OST Grimm, Troupe Master

This is the theme of 9&#$)#$&%)##???%#&9>? and you can find it in #&*%).

IT.IS.OUT! Binding of Isaac Revelations Chapter 1 AND 2 by Team Revelations is released and is available here: https://steamcommunity.com/sharedfiles/filedetails/?id=1536643474
You can also find the OST album here: https://nvnmusic.bandcamp.com/album/binding-of-isaac-revelations-chapter-2-ost

Binding of Isaac Revelations Chapter 1 - Mirror Mirror On The Floor

Battle of Hornet Symphony (Classical Style)- Hollow Knight OST

Mix uploaded by Noir: https://www.youtube.com/channel/UCQD-HclNkZ5Tds6HtNR01Gw

Music made by Christopher Larkin: https://www.youtube.com/user/ComposerLarkin

Buy Hollow Knight, if you haven't. Fantastic game.
https://store.steampowered.com/app/367520/Hollow_Knight/

The Troupe Master (Grimm + Nightmare King) - Hollow Knight The Grimm Troupe DLC OST

Tuba Archmage Boss Theme

Original by MrKorny (not too sure)

https://youtu.be/_-J7Y1UBvuo

Binding of Isaac Revelations Chapter 1 - Mirror Mirror On The Floor

Wertandrew