I wanna share one that's on the personal side as it's a soundtrack I ripped myself: Geist (2005) or "the other first person shooter on GameCube, you know, the one that wasn't Timesplitters"
I spent all of August last year playing through at about 5 fps on an emulator, dumping audio to re-splice into full cuts w/ track outros and everything. Tedious stuff and a lot of work, but a worthwhile labor of love. Up until that point as far as I can tell it was just speaker recordings on YouTube. You want obscure stuff, well there you go
Anyway it's definitely your standard fare campy dramatic military orchestral score, albeit charmingly rendered in MIDI. Some of the more nuanced tracks suffer from that, but the ones where it goes all-out bombastic are unforgettable.
Here's a download in 256k MP3: http://www.mediafire.com/download/j8p1k5hxao6907x/Geist+OST.zip Or a sampler if you need to be absolutely sold first