I'm honestly surprised that falcom hasn't shown up in this list yet, since i consider their music as arguably the best in video games, so i'll post a few tracks from a few games, just be aware this post might have alot of videos because it's very difficult to keep it short, i will try to keep it to 1 song per game but i might have to increase it to 2 for some just because some are THAT good, i will keep it to 1 track as much as possible, even though each could have 10-20 tracks on their own without a doubt.
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Ys 8 - Unquestionably my favorite game of all time, a spot held by phantasy star 4 for over 20 years, this is also one of the few games where i can say every track is amazing, and probably my favorite soundtrack of all time, i'm adding 2 tracks to this.
Sunshine coastline, usually considered the first major track in the game.
Everlasting Transeunt - The credits theme.
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Ys the oath of felghana, a remake of ys 3 made in i believe 2006, quite legendary for it's soundtrack on it's own.
Valestein Castle, probably the most known track from the game, though like ys 8, it's a amazing soundtrack all around.
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Ys Origin, considered a prequel to the ys series proper, it is known for it's well done soundtrack as well.
Genesis Beyond the Beginning - intro theme.
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Ys I and II Chronicles - Technically this song is from a 1990 game, but a upgraded remake also updated the soundtrack with modern instruments, making a legendary track, again the soundtrack in general is amazing.
To Make the End of Battle - Intro Theme.
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The Legend of Heroes Trails to Azure - A good game, the music is for the most part very good.
The Azure Arbitrator - Final Boss theme, normally i'd select a different track as there's plenty but this is honestly one of the best final boss themes from falcom and in gaming history imo so i have to post this one specifically.
https://www.youtube.com/watch?v=h8CmfRgxvVQ
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The Legend of Heroes - Trails of cold steel III - A good game in the anthology but i prefer the 4th game and reverie more, it's music however is amazing, some carries over into the 4th game.
Spiral of Erebos - A intro and the final dungeon theme, like the azure arbitrator above it's too good to not post.
https://www.youtube.com/watch?v=wHvnwxAg5ww
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The Legend of Heroes Trails of Cold Steel 4 -The End of Saga- - Probably my favorite "Trails" game (currently at 13 games), and it's soundtrack is amazing as well, here are 2 of my favorites.
Lyrical Amber - A town theme, and a beautiful one at that.
https://www.youtube.com/watch?v=VekMorjnRuk
Mystic Core (sen Ver.)This is a dungeon theme, it's also kind of a cheat as this is a remix of a theme by the same name in Trails to Azure, but i like the Cold Steel 4 version a bit more.
https://www.youtube.com/watch?v=amIW1m9MlDI
I should point out that Cold steel 4's final boss themes are also some of my favorites in the series, but i decided to limit myself to 1 final boss or final dungeon them for the trails series of games.
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Zwei! - A quirky game that has beautiful music in it's own right.
Final Battle ~Demon Lord Vesper~ As the name suggests, it's the final boss theme, however the track is far too amazing to not mention, as anyone who knows how great celtic style music is will attest.
https://www.youtube.com/watch?v=JTqwGW5ZKYc
And since i haven't mentioned too many that were before 2000 (not that there aren't plenty, it's just if i posted all the good ones i'd be here for a week):
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The Legend of Xanadu - This game has not been translated into english so i have little to say about the game or music's position itself, so i'll just post it.
Legend of the Wind - Supposedly a intro theme, a great theme nonetheless.
https://www.youtube.com/watch?v=9433h1EeqcQ
Let me be clear i could post a thousand more, but i just wanted to show how underrated nihon falcom jdk band is.
If someone posts something else, i'll post after them games not by falcom lol.
Sadly because of site limits, the others have to be links.