I'd have to go with Flatout 2. Incredible game, incredible rock and metal tracks.
Some of my faves include:
Theme Hospital (gotta love those old soundblaster FM sounds).
Rimworld
FTL: Faster Than Light
Toejam and Earl on Sege Genesis
From me too. One of the best OST for sure. Especially considering the team size.
Bastion had a really dope soundtrack.
https://www.youtube.com/watch?v=oLA0vB9LCTM
Dont think I have a single favourite there are too many greats to love:
Goldeneye 64 original from the days of Rare's greatness, theres also a great remake soundtrack on youtube.
Hollow Knight, Christopher Larkin just nails it (the track "Lace" for the upcoming sequel slaps too)
Celeste, just amazing work by Lena Raine
Katana Zero, my current go to "work" music.
C&C 1 Not all great but there are a lot of good tracks on that soundtrack, and it opened my eyes to game music.
C&C Red Alert 2, Hell March 2 is just awesome, the rest of the soundtracks slaps.
Celeste's soundtrack is really good and some B sides are grade-A bangers
Dont forget 7, its the best of the bunch. Not only is every track a banger, they are all bangers without even a game attached. I could listen to Magic Spear 1 and many others like all day
Nier is my go to slug answer. Incredibly unique sound, but I have been playing through the visual novel Fata Morgana rn and it has a similar kind of aesthetic and it kicks ass. Utterly fantastic tone https://www.youtube.com/watch?v=uAbauJc4Oxo. My other go to answer of course would be SotC and its very funny listening to it by itself that's obviously composed by somebody who composed for Gundam. Another vn I don't really like but I do think is a very interesting playthrough and has a few great emotional tracks as well https://www.youtube.com/watch?v=bZWd_7Ud-Lc
Every single FFXIV track
World of Warcraft has the iconic ambiance music
Pillars of Eternity 1 & 2
Divinity Original Sin 2
Tyranny
Bloodborne
Darks Souls 1-3 - I write to Gwyn's music on occasion and the Majula theme from DS 2 acts as a muse for all my writing sessions
Neverwinter Nights 1
Bastion
Donkey Kong - Every single fucking song rocks
It's not my absolute favourite and the game had it's fair share of faults but I really like the soundtrack to Far Cry 5, but I'm a sucker for roots music.
A lot of the music in 2017's Prey kicked ass, too.
I like songs from the cult in Far Cry 5 and the Resistance theme. Although, any youtube video of the cult songs is infested with chuds.
Yeah, it's disconcerting how many Youtube chuds seem to want to join a not particularly fleshed out, fictional, armed religious group from a video game but I guess that's 2020 for ya