Thinking about some of my favorite stuff these days, so much of it has turned into pure metal lol
Doom Eternal - It's a hard pick between the first and second game, but I think the second hits more for me.
Brutal Legend - This one feels like a cheat because it's just a collection of great metal songs, but it has good original music too.
Metal: Hellsinger - All original music, great singers chosen to bring a voice to it, love it.
Guilty Gear: XRD - This one is another hard one as GG has always had great music, but this game was a big style shift for the series and I think overall it's damn good, continued on into Strive.
Banjo-Kazooie - And here's the odd one out, but I love the music for the original game so much. A lot of Rare games have incredible music due to folks like Grant Kirkhope, Robin Beanland, and David Wise, but BK has always been an amazing game for me and I adore the music.