Extracted and edited from in-game file, all copyrights goes to HyperGryph.
Note: this is NOT the original files in the game, NOR released by HyperGryph officially.
download link for all soundtracks (including unreleased ones) : https://arknightsost.nbh.workers.dev/
For soundtracks that are not released on EN server of the game (released on CN server before), you can find it there: https://www.youtube.com/playlist?list=PLih_zMjUgynE1vulJ0qjtltGheTrOmS0x
(WARNING: SPOILERS ALERT)
