My most memorable game soundtrack is from one of the first games I have ever played: Windham Classics produced Swiss Family Robinson, an interactive text adventure for my Commodore 64. In the story you get shipwrecked and find things on an island. One of those things is a musicbox. The object was useless but when opened it looped the greatest midi song I have ever heard and still remember it to this day!

Funnily enough my pick would be the soundtrack to Heroes of Might and Magic 3.

It was the first proper PC Game I got into. My father was a big fan and so he taught me how to play when I was still very young. I always liked the music in the game a lot and would purposefully wait to listen the music whenever I would enter a battle or just click away at random buildings in my cities (essentially doing nothing) just to listen to some of the amazing town themes. The soundtrack to this game just couldn't be more climactic and fitting, none of the previous/following titles delivered as good of a soundtrack in my opinion. One day when I had issues with the game and was browsing the game files to try to fix it, according to some sketchy youtube tutorial, I found the mp3 files of all the tracks in the game files and these mp3 files are to this day the first album added to my iTunes library on my phone (back when first added it was an iPod touch but I have moved onto a new Apple device since then). It maybe would have changed at this point if not for the fact that the original soundtrack is still not available for streaming and so the mp3 import still decorates my library. In a nutshell, you could say that this soundtrack is the most memorable to me because it was the first proper PC Game I got into, I have a weird story of getting the soundtrack onto my phone, and lastly because the soundtrack itself is a masterpiece that everyone who has played the game even once can immediately recognize.

Haha, absolutely. Gothic1 is so incredibly unique in the way it handles the overall atmosphere, which the soundtrack is largely responsible for. I will never forget the time when I accidentally wondered into the forest on my way to the swamp camp and disturbed the resting shadow beast. That feeling of absolute terror and panic was as real as anything :D. Gothic1 is one of the very few games where you are comfortable to call a cave full of cut-throats, a ruin full of thieves or a swamp full of religious fanatics your home, because the rest of the world is just SO MUCH worse :D. My favorite track would probably be the swamp camp. Sitting down at Fortuno's smoking some pipe and chilling out was easily my favorite thing to do.

Gothic 3 has a stellar soundtrack that really elevates what is a pretty mediocre game. The music is incredibly varied depending on the environment and in-game time, and the tracks can be sad, atmospheric, epic, exciting, relaxing, or all of the above. There's also some sort of Nordic wind instrument used in the snowy areas and it sounds amazing.

The most memorable game soundtrack has to be either pikmin or bloodborne.

For pikmin, a significant amount of childhood nostalgia is linked to area sound tracks like the forest navel. Memories of countless carefree hours spent exploring, staying up late with my dad looking for ship parts flood the mind when I hear any of the music from that game.

As for bloodborne, I really love the grandeur and epic nature of the entire soundtrack. The orchestra and choir join into an overall haunting and epic score, that perfectly encapsulates the games setting.

Most memorable soundtrack would be HoMM.....II. Love HoMM III's soundtrack, but I grew up playing the second one so it takes the cake for me. Just listening to it I feel transported in each town, each field, each battle...

Diablo.

Hands down a perfect soundtrack. Everything about that game set the atmosphere perfectly but the soundtrack most of all. I'm sure many gamers of that generation would agree that few soundtracks are as iconic and did their job so well.

I challenge any early video gamer to listen to those tracks and not remember dark late nights on ancient PCs, dimly lit by the glow of your monitor mimicking the never-quite-enough light of your torch radius as you ventured into the depths of hell. The suspenseful anxiety etched into our collective memories for decades hence by that simple score.

Which game music is the most memorable, good question:

This is difficult as the music tends to be geared to whatever happens in the game - just like film music and many games have many great soundtracks.

However, having said that, I suspect for the one I am most attached to, I need to pick the Witcher.
"Dusk in Northern Kingdom" has been my alarm sound for over 6 years now - which is incidentally from the Witcher I.

The most memorable video game soundtrack for me is NieR:Automata's. It fits every area/situation of the game so perfectly, and adds a lot of atmosphere. The soundtrack lifts Automata – an already good game on its own – to make it a truly memorable experience.
Plus some of the tracks gave me big Ghost in the Shell (1995) vibes, which I love.

A wide variety of game soundtracks influenced me a lot.. whether it was Zeliard, Quest for Glory 4, Mechwarrior 2, or Total Annihilation. Many OSTs became a part of my musical DNA. Some rare games, though, had soundtracks which really touched my soul in a special way.

A number of them happened to be LucasArts adventure games. I find it hard to narrow this down... The evocative, Wagner-infused score for The Dig felt deeply personal for me, as did the soulful and absolutely authentic jazz of Grim Fandango, and the similarly authentic acoustic instruments, atmospheres and themes of Curse of Monkey Island...

... but if I have to choose one, right now, it's going to be Monkey Island 2 - the original imuse midi soundtrack played through a period sound card (or good emulation thereof). In spite of the technical limitations, this music manages to be deeply atmospheric and transporting, as well as being infused with the soul and humour of the game.

When I hear the music today, it has a unique feeling and effect for me that no other game OST can quite achieve. It's a part of my soul now. Those notes and synthesized tones trigger something deep inside me.

(... and the original composers are returning now for Ron Gilbert's 'Return to Monkey Island' !! Can't wait. )

ShadowRun on the Sega Genesis's soundtrack is forever etched into my brain due to the many frustrating and enjoyable hours of my life that I dedicated fighting in the streets, penetrating security, and making runs on the Corporations' networks. The repetitive yet soothing early 16-bit soundtrack made the gameplay something to get lost in.

For me it's the main tune from Supaplex, because I spent so many hours in this game, completing all the levels several times, that it's practically ingrained in my brain cells. ;-)

Most memorable game soundtrack for me would definitely be the Baldur's Gate one. It took me ages before I was able to finish it. I received the game for my birthday from my older brother. As happened with longer games I often stopped playing them because other things in life happened. Baldur's Gate was one of those games I kept returning to, however.
Thanks to this game, among other things, I also started to get interested in pen and paper RPG games. My brother stumbled on a Dungeons & Dragons album by Midnight Syndicate in our local music shop. Now, years later, we still play a lot of TTRPG and this album, together with the Baldur's Gate soundtrack, is often playing in the background. Many younger people I play with don't know the music and I always feel a little bit proud (and old) when I can bring some ancient culture to the table :)

First I'll answer in the spirit of the question, then add a little more. For me it would be Final Fantasy VI. The music of Nobuo Uematsu has always been welcome in Final Fantasy games, but here the whole soundtrack shines. From "Kids Run Through the City" and "Terra's Theme/Tina" to "Aria di Mezzo Carattere" and "Wedding Waltz," this is some of the best music to accompany a video game. My spine tingles every time I listen. Paired with the storytelling of the game, the OST remains one of the most memorable to me due to how it sets the mood throughout the game.

Less on-point, Potion - Relaxin' with Final Fantasy makes for a wonderful extension of those songs, covering many of the early Final Fantasy games. Getting ready to work for the day, and putting this one on now.

Medal of Honor: Allied Assault.

Michael Giacchino did such an amazing job with this soundtrack. The ringing bells and the drums at the beginning of the main theme, with the strings and brass joining in still immediately captivates my imagination.