Happy (belated) birthday Ross!
A few of my recommendations have already been stated, but I will still try to avoid super popular games/soundtracks here. but really try Undertale
-Oneshot
An RPGMaker game, but it is not a traditional RPG, but rather more of an adventure game with a cute protag, a mysterious atmosphere and
http://nightmargin.bandcamp.com/album/oneshot-ost
-OFF
This one is a turn-based RPG, but you might still enjoy it for how intensely surreal the game is. The OST is pretty fitting, being just as spooky and surreal as the game.
(I apologize, but the original tracks are not that much higher quality)
-Freedom Planet
The best Sonic game to come out since S3&K. The soundtrack is pure hype. If you play the game, however, play classic mode. Trust me.
https://galaxytrail.bandcamp.com/album/freedom-planet-official-soundtrack
-Ikaruga
A Japanese shoot-em-up with an interesting gameplay mechanic known as the "polarity system". The game IS a tough-as-shit bullet-hell, but the OST is undeniably great.
http://www.ikaruga.co.uk/downloads/soundtrack.php