So if its already in the game, forgive me as I couldn't find any information on it. We are still hunting rolls but one tune that came to mind which seems kinda iconic to me and would love to see it here.

https://www.youtube.com/watch?v=vqmDtgz0o1c

I know I heard a snip of it after getting my DRK Relic but looking in the full list of songs that some have posted I see no mention or site of it. Perhaps it is also a reward for gaining more later on via achievement?