Most nostalgic / sentimental game music for you?

hm there are a few indeed. usually old games. the older you get the harder you are to impress.
obviously new games come with good music, too. sometimes...

The Great Giana Sisters / C64 Intro
total annihilation
dungeon keeper
Assassin's Creed 2 OST / Jesper Kyd - Ezio's Family (Track 03)

Mad World from Beautiful Escape: Dungeoneer

Every time I hear that song I immediately picture the game, and I'm pulled right back to the feeling of playing. I don't think another song is as vividly tied to a game for me as that one is.

No song has more nostalgic value for me than: Final Fantasy 6 Opening Theme

https://www.youtube.com/watch?v=Y6ljFaKRTrI

Crono Cross Opening
https://www.youtube.com/watch?v=923fVDDwaHo

Moon Theme from Ducktales (this is the remixed version, wich is great)
https://www.youtube.com/watch?v=YHEifuLCSIY

Little Big Adventure 2 Soundtrack
https://www.youtube.com/watch?v=X3YMfaqvWBg

And many many more...

Ar Tonelico 2
Xenosaga 3
both BGM in the boss battle, the usage is wonderful :)

The one this incredible list is missing:
The Last of Us - All Gone

Many, many games from Amiga era, Morrowind and Unreal Tournament soundtrack.
https://www.youtube.com/watch?v=X9UTnUcyED0 is one noone mentioned so far.

Baldur's
Starcraft
Everquest

SRTT

Pitfall II (Atari 2600)
Turrican 1 (Amiga)
Might & Magic III (Macintosh), especially outdoors theme and temple, where I discovered I loved organ music, and harmonizing to it.
Diablo (Tristram)

Ai No Uta from (an advertisement for) Pikmin. The lyrics break my heart every time.
Opening Theme/Terra's Theme from Final Fantasy VI.
Enfants Disparus from Beyond Good and Evil. (I know this track is mostly monologue, but listen to that music in the background! Plus it's on the OST, so there.)
Build That Wall/Mother, I'm Here/Setting Sail, Coming Home from Bastion. Anything from Bastion.
Fortress Mode from Dwarf Fortress. Because not all my nostalgia is for having my heart broken, I swear!

edit: Not to mention the entire Heroes of Might and Magic III soundtrack! Perhaps my favorite game ever, and the Dies Irae sneaking into the Necropolis theme warms my musician's heart.

Littleroot Town

Gargoyle's Quest - Various

Zelda - Song of Storms
Zelda - Gerudo Valley

Siege of Madrigal

SW Kotor
https://www.youtube.com/watch?v=jSKvMyruPTA&list=PL43516D2ACB876976

https://youtu.be/boLDfRhq79Y?t=70 best song of furi.

Whenever I think about that, the first one that comes to my mind is the Tristram OST from Diablo. Tough there are many other that drag me to the nostalgia feeltrain, like A Storm is Coming from Commandos 2.

I feel like all the really old classics will be mentioned, so uh...

Dragonica Login Screen.
Harry Potter Game OST.

Little root town - Pokemon
Even though I've never played any Pokemon games as long as I can remember, let alone ever bought Nintendo consoles. But this music is somehow nostalgic.

I was an 80s kid so this qualifies as something that "hits me right in the feels"
https://www.youtube.com/watch?v=oWuzaYXccW0
ZX Spectrum - Saboteur 2

there's too many of them.. but i'd go for to zanarkand too, melodies of life and eyes on me, many tracks from ff7 too like cosmo canyon.. many from chrono trigger and other '90s jrpgs.. most of all though i'd say the intro track of ultima online, that strikes me to my heart every single time.. SNES era anyways most of them, and i'm so happy and nostalgic to read so many comments about final fantasy games and everything coming from that decade.. as an '80s kid.. =P
oh and pokemon too, played on the super game boy -> snes.. red and blue in no-internet southern europe.. =P

this ones been mentioned but i'll post a remastered song

Every time I hear this I see 3 knights plowing through a blizzard with the lights of a distant city coming ever closer, the start of one hell of a journey.
Final Fantasy 6 opening scene

Gothic 3 - Geldern at night - https://www.youtube.com/watch?v=wCtV4DYZkK0 - still one of the best soundtracks I've ever heard.
Heroes of Might and Magic 3 - Rampart theme - https://www.youtube.com/watch?v=jQr6NVUOtw0 - this guy does fantastic covers
Heroes of Might ang Magic 4 - Grasslands theme - https://www.youtube.com/watch?v=m5vEXnWQOH0 - while HOMM3 is king and also has fantastic music, HOMM4 prolly has the best music in the series
Witcher 2 - Dwarven stone upon Dwarven stone - https://www.youtube.com/watch?v=d_jizNCiInw - this legitimately made me stop running around Vergen, just sit and stare at the screen for a few minutes listening to the music
Planescape Torment - Annah's theme - https://www.youtube.com/watch?v=CKhzMxQE40I - one of the best games ever made
Diablo - Tristram - https://www.youtube.com/watch?v=4Z6ZJQEGVGY - I absolutely love this cover

Evil Genius
Brothers in Arms -.Hell's Highway
Deus Ex - Human Revolution
Supreme Commander