Best Game Soundtrack

[Appelsider]

What game series had really good soundtrack! Talk about em or post some vids!

I personally have to say that Ys VIII has have to have the most diverse music and memorable soundtrack for me.
Theme song:

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But Octopath Traveler's OST is objectively beautiful its outta this world!

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What osts did you guys like?

 

[Aiya]

For me, it's either Xenoblade Chronicles or Splatoon.

With Xenoblade Chronicles, I haven't played it myself, but I've watched a Let's Player do it's entirety. Every Quest and even bonus content. Even now, I find myself looking up music from that game just to relax to. Gaur Plains has to be my favorite.. 

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As for Splatton, what can I say? Splattack is awesome, and my personal favorite is, of course, Calamari Inkantation

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And, bonus, someone made english lyrics for Calamari Inkantation, and I've listened to it so many times!

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[ShineCero]

Nier and Nier Automata by miles.

Here's a few snippets of its glorious soundtrack - there's a reason why it won acclaim awards for its musical score:

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