Oppression Ambience - Red Faction Guerrilla (starts at 48:20) The entire soundtrack is also available on steam but this one track stands out to me
The entire soundtrack of Nightmare Creatures is great, some creepy ambient tunes as well as rocking boss fight tunes. No idea where to find a good source for all the music except for ripping it from the disc. I do have a physical copy of the game so if you like the OST maybe I can try to rip it and keep it in good quality.
Here are two examples:
Ambient:
Boss fight:
There's also Nightmare Creatures 2 but I've never played it so I dunno how the soundtrack is on that one.
Next up is this track from a game called Kwon Ho, this game was an online Fighting game that was removed only a few months after it started so I doubt many people know about it. Most tracks are comparable I guess but this one stands out to me. Considering the game is no longer available I dunno where one would find a high quality soundtrack of it.
I really love the title themes of all the Metroid Prime games
Metroid Prime 1:
Metroid Prime 2:
Metroid Prime 3 (still gives me shivers):
They also released a trilogy collection with it's own theme which is representative of all 3 games:
Sega CD and Turbografx/PC Engine CD games seem to have cool soundtracks and I definitely don't know about all of them myself so I'd suggest going through the entire library on your own and see if you can find high quality versions of the music. Here are some examples though:
Sega CD:
Turbografx/PC Engine CD:
https://www.youtube.com/watch?v=0yoUfdIYVCw
This arrangement of Phantasy Star music is pretty cool imo:
https://www.youtube.com/watch?v=-gRGh0FMbJY
The music from Terminal Velocity and Fury³ is pretty epic if you ask me:
https://www.youtube.com/watch?v=H52f4cQ9aS0
https://www.youtube.com/watch?v=QYO6rVRd-ao
And now for some chiptunes (mainly 16 bit) gonna try not to go for obvious ones (Sonic, Castlevania, Megaman, Metroid, Final Fantasy etc. <-- These ARE all great too though) If you don't like them because of their chiptuny quality, perhaps OCremix has some cool variations?
Warsong (Sega Genesis):
https://www.youtube.com/watch?v=hVMe0Alp8hw
Contra Hard Corps (Sega Genesis):
https://www.youtube.com/watch?v=4laPsTKiaLY
Actraiser (SNES)
https://www.youtube.com/watch?v=P_fL8jAm-kg
There's also an orchestrated version of that one here:
https://www.youtube.com/watch?v=QuxeyAU15NE
Demon's Crest (SNES):
https://www.youtube.com/watch?v=RJr3B3ZRF2k
Blackthorne (SNES):
https://www.youtube.com/watch?v=heWQ4OsgndI
That's about all I have so far, I'm sure I'll remember more later on so I'll probably keep posting here and looking for all the amazing soundtracks other people are posting
Happy birthday Ross!