I'm gonna come in here and hipster up your thread by throwing in a "surely people are at least aware of most of these songs" comment. At least Final Fantasy Crystal Chronicles; Kirby's Return to Dreamland etc. are things I've seen passing through r/gamemusic (<3) quite a few times. Props for the Genetos; Sensei 2 & Pangya mentions though - I'd never heard of those.
Here's my contribution: Terracon for the PS1. When I brought this up over there, I don't think anyone had even heard of the game; let alone listened to the soundtrack:
Horrifically overlooked game with a stunning soundtrack that sadly fell to the depths of obscurity.







