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Enjoy available in MP3 & FLAC.

https://steamcommunity.com/app/677120/discussions/0/1680315447987644069/
Post edited May 01, 2019 by armedready
Thank you for posting this.

Direct link to save some clicks.
http://www.crackshell.dk/ost/

Both Hammerwatch and Heroes of Hammerwatch in mp3/flac.
Very cool.