Homeworld-Adagio for strings. Why? Because it's beautiful.

Morrowind.
I used to sit listening to title screen music for ages before starting the game proper. It was just so epic and majestic, really gets the adrenalin going to beat up some cliff racers.

Gotta be Jeremy Soule's TES series scores. Themes from Morrowind are re-imagined in later games (in addition to new music) and that gives the impression of not just a single soundtrack, but an entire musical world.

Diablo 2 - I played that game so much when it first came out that the soundtrack haunted my dreams lol.

for me it was Gothic. they were the first who had a real Band (virtually) playing in the Game.

Never really thought about this before, which is strange given how many games I've played (and play)!

I'd say the most memorable is probably Baldur's Gate, mostly because I spent SO many hours playing and replaying that game (and the musical scores are burnished into my brain as a result!). That said, the musical scores definitely fit/served the situations in the game, which seamlessly made it a part of the playing experience.

Playing Heroes IV back in 2005 on my brand new Pentium 4 and hearing Karin Mushegain and Dean Elzinga in the nature theme for the very first time with headsets on. My mind just left the room. God it's been 17 years already.

I also remember back in 2010 when i got a new PC and had a dedicated sound card for the very first time, a Asus Xonar D1. Started listening to all my playlists and reinstalling old games, from Heroes III to Diablo 1 just to see the differences in sounds. A good soundtrack makes such a huge difference, it can either set the stage or break it.

Prince of Persia - I had it on my MP3 player in high school and I still think about it sometimes.

Hotline Miami 1 and 2. I listen to almost every single track pretty much everyday, as they're simply the exact type of music that I can get worked up on when biking, for example.

Closely followed by Gothic 3 and The Settlers 5, because I played those games till Oblivion in my youth and have those soundtracks still burned in my memory 10 years later and Gothic 3s Soundtrack is just the most epic Soundtrack I think I've ever heard in any game.

Oh, why not? I'm in! You know, there are not many soundtracks I really remember all that well, ones that I would listen to without playing the game. Oh, there are some main themes I remember and love, but a whole soundtrack? That would have to be something really special.

Luckily, there is something special like that out there. DUNE- Spice Opera, from 1992 Dune game composed by Stéphane Picq and Philippe Ulrich. Now, I could go on at length, and probably have at other times already, about the game itself and why it's so special to me. But the soundtrack, the Spice Opera (the title alone is great) is a masterpiece all its own. The fact that we have two great Dune movie soundtracks, one from Brian Eno and Toto, and one from Hans Zimmer, and this is a computer game soundtrack from 1992 that holds its own in comparison with them says volumes. I really can't think of another soundtrack like it, in either games of films. and while the game was loosely based on the David Lynch film (at least visualy), the soundtrack is strikingly original, entirely its own thing. It is futuristic, organic, bizarre and grand, every note worthy of the sci-fi epic, while retaining some of the "bip-boop-ness" typical of late 80s - early 90s games.

My most memorable is Final Fantasy VI. All of the music was awesome but the opera scene seemed to have genuine feeling to it that I will never forget.

There are lots of memorable soundtracks, but for the purposes of this contest, the Neverwinter Nights soundtrack for the original campaign stick in my mind.

Gotta go with Starcraft or Diablo. Most of the songs are instantly recognizable by gamers of a certain age. Recently though Cyberpunk 2077 and DOOM both have had amazing soundtracks.

While not necessarily a soundtrack, the radio stations in Fallout New Vegas are burned into my brain after the hundred hours I spent wandering the Mohave Wastes.

That or Castlevania Dracula X for the SNES. That bass line from the first level as I whipped skeletons into flaming piles of ash sticks with me.

The Morrowind Soundtrack will stay with me forever. As soon as that opening swell begins, I'm taken back to a faraway land. Everything is strange and new again. Jeremy Soule has done some fantastic work in his time, but that soundtrack is one hundred percent perfect. Every ambient piece, every rise and fall, and I'm transported. I'm lost. It never fails. I love it, forever, and nothing else will ever compare.