Challenge rooms these evil rooms tempt you with a item or chests but when you take the reward you get locked inside and have to fight to leave 

Time to throw the run on a fucking chest!

Although this is a remix of crusade, the standard boss fight OST. It is amazing. I'm glad they made this for the challenge rooms.

Theme of a new boss from TBOI: Repentance. 
Uploaded because nobody else did.

Morticide / Corpse Fight (The Binding of Isaac: Repentance)

The Binding of Isaac - Repentance OST

i take video game music and upload them for use in roll20 and you guys listen to it too