Suggest a game with a great soundtrack

NaissanceE

Grand Theft Auto (the first one)
Command & Conquer (the first one)
Return Fire (https://en.wikipedia.org/wiki/Return_Fire)

Not mentioned yet:
Dust: An Elysian Tail
Lord of the Rings War in the North
Brothers - A Tale of Two Sons
Spacechem
Botanicula
Cave Story
The Lord Of The Rings - The Battle For Middle Earth
The Lord Of The Rings - The Battle For Middle Earth
Sanctum 1 and 2
Dungeon Defenders
Orcs Must die!

Divinity II
Divinity Original Sin

Starcraft 2: wings of liberty. Terrans have OP soundtrack xD Also it's free to play currently.
Other games I wanted to point out are already mentioned above :)

GTA: Vice City and Bully immediately come to mind with their amazing soundtracks that span throughout literally the whole album. Not a single dud.

Metal Gear Solid V

Reassembly!

It's a very chill, relaxed set of tunes that I can listen to back to back to back.

Immortal Redneck. Yay, another chance to remind people of my favorite game of 2017
Into the Breach, or one of the other soundtracks by Ben Prunty.
Ikaruga Electro/classical hybrid. Fun fact: The game's stage layouts are fully choreographed to match the soundtrack too.
Crimzon Clover more Shmup, more kick-ass soundtrack.
DoDonPachi if you need more Metal in your soundtrack diet.

I played Owlboy recently, it has some nice music.

Off the top of my head, I can think of several, but it all depends on what type of music you're looking for.

If you like symphonic heavy metal: Karmaflow
If you like aggressive electronica: Portal 2
If you like passive electronica: BeatBuddy
If you like new agey relaxation: CreaVures
If you like catchy insanity: Boo Bunny Plague

Chrono Cross

Although I've seen that most of the games with great soundtrack I like are already here, I wanted to share one game I found by chance cause it's was the soundtrack what made this game a nice experience to go through.

The game is Defy Gravity, it's a game that cost like 99 cents, and if I remember well, I think I got it on sale for half the price. The game itself it's a short succession of platform and puzzle levels which can give you a couple of hours of entertainment. As I said, it was the ost what made me like the experience and for a game that cost less than a euro/dollar i can say it leaves you
humming some of their songs for a while. It became a pleasant surprise :D (for a game with that Budget xD)

Dune https://www.youtube.com/watch?v=FjHon6yg-r8
(My favorite track being the one referred to as "Morning" in this version. It's a bit confusing because apparently there are a bunch of versions and distribution has been scarce due to copyright issues)

After checking the 3 pages i noticed no one told anything about "Jade Cocoon" wich was a ps1 game. This game had suffer a vivid critic as a pokemon clone, but actually totally wasn't.. it was a game with a very unique atmosphère, and the soundtrack was spot on with this game for me ! I really loved the ocarina style in the song

my favorite : https://www.youtube.com/watch?v=mIlc_IXLFB0&t=321s

The Void (game is not for everyone but music is beautiful)
Kentucky Route Zero (a lot of nice ambient stuff but the vocal tracks are where it really shines)
Machinarium
Botanicula

Sid Meier's Civilization V - Civilization V: Brave New World Theme
Skyrim - The Dragonborn Comes
Hitman Blood Money, probably not the best, but Ave Maria is great.

Plenty of stuff with nice music I'd have posted already appeared in this thread, so without repeats, here's La-Mulana.

There's loads, but currently loving Forgotton Anne.
I also recently fell in love with this song from A Raven Monologue

I really enjoyed the OST from PRICE (Free-to-Play)

Cold War Assault 18 years later it still gives me goosebumps
FDF Mod for CWA same, minus 5 years
Alien Power abd now i´m feeling old :E

Obscure
Get Even
L.A Noire

Anything from Stardew valley.
Transistor and bastion has good osts.
And some tracks from "A Normal Lost Phone".