Patient Gamers

Persona 3/4/5 are goated on their own ways in my opinion.

The Final Fantasy X soundtrack is great too

but rn my obsession soundtrack is Neon White, I love machine girl https://www.youtube.com/watch?v=Z9X15iDR7z8

Cyberpunk has ton of awesome tracks

Pon Pon Shit

Ape Out really only has the one song... but it is perfectly utilized to puncuate the gameplay experience.

final fantasy, anything thats NOT 7 simply because its played to death.

I think nothing top the JRPGs. My current favs would be Nier: Replicant & Nier: Automata. There's also this rather obscure game I love called Ar Tonelico in which the music is part of the story; of course that wouldn't do if the music suck.

Other than that, I love the entire soundtracks for both Cult of the Lamb as well as Stray.

Beyond Good & Evil

I got one I'm betting we won't find on here yet...

Alone in the Dark 5, an incredibly ambitious game that fell short, but had some great ideas.

One of which was how that incredible soundtrack by Oliver Deriviere drove this particular playable sequence, 59th Street .

The whole soundtrack done in conjunction with "The Mystery of Bulgarian Voices" is absolutely stunning for an action-horror title.

It was the best part of the game and an incredible example of meshing soundtrack with cinematic gameplay.

. . . actually? All the stuff he does is freaking awesome, so see/listen to his other titles like:

• Remember Me (Awesomely underrated!)
• Obscure

Other (lesser known / thought of?) good soundtracks off the top of my head:

• There Came an Echo (by Big Giant Circles. So good they used the theme in Stranger Things! Season..2?)
• Anything by Supergiant lol.
• Oni (bungie / rockstar)
• FTL
• Metro 2033, Metro: Last Light, Metro: Exodus
• Deus Ex: Human Revolution
• X-COM: Enemy Unknown and X-COM 2.
• King's Quest VIII: Mask of Eternity

I'll probably add to this if I think of any more. :)

Civ 3 has my fav soundtrack. My favorite is this gem you get in the modern era:

https://youtu.be/MPe5an9VltI

I would like to throw in Terranigma's OST. Specifically, the Hometown theme song.

I really like the Rome Total War Soundtrack by Jeff van Dyck

None mentioned (all links are yt) Axiom Verge (s), Defcon, Element4l, Furi, Giants Citizen Kabuto, Painkiller, Risk of Rain (s), Speed Runners, They Bleed Pixels, Wildstar or any Zachtronics so far.

Nobody's mentioned this one yet, perhaps because it's a bit obscure, but Vib-Ribbon (PS1) has such a unique and endearing OST. I never played the game, but I heard one of the songs and got totally hooked.

Unreal

Super Monkey Ball 2 - not in the sense that I'd want to sit and listen to them, but they really fit the game super well. And I've heard them sampled in actual songs before... Also as YouTube video background music many times.

Pillars of eternity 1 and 2, octopath traveler, Chrono trigger, streets of rage, sonic 1-3, and doom eternal were all pretty amazing

Destiny 2 has some fantastic pieces. Deep Stone Lullaby, Journey, Aethenasia (sp?) to name a few.

I don't think I've seen any shmup OST mentioned, but there's so many that I think are bangers.
A favourite of mine would be DoDonPachi DaiFukkatsu / Resurrection, specifically Black Label Stage 2.

Chrono Cross.

All the Astro Bot games have phenomenal soundtracks, Kenneth CM Young (of MediaMolecule) is brilliant and knows how to write really catchy earworms. Really got stuck listening to Trapped in Time and Papa Tree.

Metal: Hellsinger https://www.youtube.com/watch?v=HidvYgF9-8Q&list=PLJQHL1SwXgq0m1LuxDGHDEWnBDFdYc2Vk&index=9