been sitting on this for a few months, made it for someone's custom map/campaign called 'zenith's descent'. it's a remix of 'fear of the unknown' (one of the pieces at the start of farewell), but i went quite far away from the original as i was trying to imagine what a b side remix of it might sound like, if there was one in the original game. this also means you should hopefully be able to enjoy it even without being familiar with the original :3
it's also on bandcamp, as a pwyw download, and soundcloud, if those are more your thing
enjoy :3
(also the background art is by orionidess, it's the chapter endscreen used in the map, u can find their other work here)