In addition to being the first truly 3D first-person shooter, the other completely off-the-chain feature in Quake was its soundtrack. Back in 1996, Nine Inch Nails was massive, having recently released the still-classic The Downward Spiral. Trent Reznor's next major release was the soundtrack for Quake, and what a soundtrack it was.
Thankfully we'll be able to own it on a physical format soon (unless you kept your CD-ROM), because the soundtrack is being reissued on vinyl. Since it's only marked as "coming soon" on the Nine Inch Nails website, there's not really much else to learn, except that it'll be a single vinyl edition and its cover mirrors the packshot on the original Quake retail release.
I've embedded a YouTube rip of the soundtrack below, so you can be transported back to a time when nailguns were all the rage, and bunnyhopping was in its infancy.