If you’re like me, and you’re more likely not, then you like the Shin Megami Tensei series. And you especially like the soundtracks. I used to listen to the Persona 2: Innocent Sin soundtrack to go to sleep, which is an interesting choice with the battle themes.
Between Spotify and YouTube, you can find most of the official soundtracks. On YouTube, you can also find some interesting remixes.
Digital Devil Story: Megami Tensei (Famicom)
Digital Devil Story: Megami Tensei II (Famicom)
Shin Megami Tensei (Super Famicom)
Shin Megami Tensei II (Super Famicom / PlayStation)
Kyuuyaku Megami Tensei (Famicom)
Shin Megami Tensei III: Nocturne (PlayStation 2 / Switch)
Shin Megami Tensei IV (3DS)
Shin Megami Tensei IV Apocalypse (3DS)
Persona 2: Innocent Sin & Eternal Punishment
Spotify has the following available: