I don’t know, some of the examples posted here that are tracks featured on Destination Goa simply don’t qualify IMO. I mean it was one of, if not the the most well known and best selling Goa Trance compilation out there. So that doesn’t really qualify as ”not well known” in my book.
If thousands of people heard them it becomes a contradiction. My definition of not very well known/obscure but still very good Goa, would be stuff that really didn’t reach a wider audience because of rarity and perhaps because the artists wanted to keep a low profile. And in some cases because of how it was shared/distributed. Perhaps only on some rare DAT-tapes.
Some of the examples here that were featured on many famous compilations I would argue are less popular, not less well known. And it’s probably in some cases due to the other music on those compilations beeing more memorable.
One theory I have is that when one has listened countless times to the most well known tracks and got bored with them, one tends to dive a little deeper and try out the tracks that didn’t immediately grab your attention before. I find myself doing this a lot at least with tracks on albums.