I watched a playthrough of Sayonara Wild Hearts a few week ago (which might be a clue about what I'm into nowadays), so I started listening to some of the songs again. I bought the game with soundtrack years back, but have yet to actually play the game part myself. This is a similar situation for a few video games for me.
I learned about Frozen Synapse because a few tracks were plagiarized by another project (a hint about what I was into back then). I got the game and while I couldn't get into the mechanics, I listened to the music regularly. The composer, nervous_testpilot, did the OST for Fights in Tight Spaces, which I haven't gotten around to, but seems like it would be my jam.
Another example is Dustforce, which I bought after watching the Quick Look because one of the songs was so chill. I completed the first few levels and it's fine, but I have played the soundtrack for exponentially more time. Lifeformed made music for TUNIC, which I started listening to on Bandcamp. I'm likely going to buy that album before I consider picking up the game.
Are there video games where you've listened to the music much more than you've played the game? Feel free to share your favorite tracks.