You cannot separate the gameplay from the audio. Modern games use orchestral scores. Y2K Tower Defense uses:
If you’ve seen the term floating around, you might be picturing a game about defending your PC from the Millennium Bug. But it’s not quite that (though that would be awesome). y2k tower defense
Best for: A game focused on futuristic 2000s tech or "saving the internet" from a virus. You cannot separate the gameplay from the audio