Games that you listen to music to while you play?

Crusader Kings 2: I do try and make a YouTube playlist suited for the culture and time I'm playing (or something approximating it if I'm playing a mod).

I never play music when playing any first person viewpoint game, nor generally in RPG's, since being able to hear the actions in game can be important to gameplay and progression. Notable exception to my no out-game music during gameplay, is the three Shadowrun games. There's generally not a great harm to losing sound in those games, and no requirement to differentiate sounds (say sound-only countdown sound near your character).

I almost never play anything else except what the game has to offer, but there were exceptions like F-19 Stealth Fighter and F-15 back in the day on C64. We blasted Top Gun soundtrack and some Queen I think (mainly from Iron Eagle movie)

Also to make up for the slow cassette loading time..

I used to do that in WoW when I was farming. Whether it was herbs, old dungeons/raids... any kind of farming, I'd play my own music. Preferably something calmer (funnily enough it was often soundrack from other games or movies).

Rift farming in Diablo III on the other hand was accompanied by quicker/louder music. There was a time where I was obsessively playing Imagine Dragon's "Friction", because it worked so well with it.

Nowadays I pick up my gathering music when I go into farming mode in Genshin Impact. Not as often as I did with WoW, since I adore soundtrack of this game, but still happens.

Since I mostly play story focused games, I rarely listen to anything other than the game audio.

A notable exception are the Diablo 3 seasons. When I play those, I mostly listen to podcasts rather than music though.

And when I played No Man's Sky back in the day, I also listened to other stuff in the background but it was mostly documentaries on youtube. For example, I made it through this really cool 24 episode piece on the cold war, all while playing nMS.

I like to put music on when playing turn-based strategy games (Civ, Stellaris, etc) since there aren't in-game audio cues you need to hear, the way you do in e.g. sports games or FP shooters.