>>1550322>What genre isn't made up?True, the name just felt too shoehorned to me.
The stuff in this thread is quiet varied in style, from sounding like just a Mario 64 Soundfont adaptation of other games's soundtracks (so play ROM Hacks if you want more of this), to that Misantrop that sounds like less organic Black Metal.
Overall I am not impressed, as I don't like ambient music much, would rather see some meme driving music style of sharp, electronic shit contrasted with medieval-style melodies and progression.
Still, I will suggest some stuff that crossed my mind, they are not Dungeon Synth, I don't think, but they might tickle your brain positively:
- Bejeweled 3 - Butterflies
Kinda trance-y, kinda medieval.
https://www.youtube.com/watch?v=VF06618niOE- Casket - No Crap on Tap!
Irish folk + Minimal Techno
Maybe not Dungeon Synth, but perhaps Dungeon EDM
https://soundcloud.com/kouki_izumi/no-crap-on-tap-demomix- Amon26 - Out of Context
Some experimental album by an edgy indie game dev from over a decade ago, I think he has since trooned out. This one is a bit like the stuff I heard in this thread, albeit less ethereal pads and more grit, which I prefer.
https://amon26.bandcamp.com/album/out-of-context-viva-la-squid-edition 
