If you want a music service that lets you customize playlists and playback modes for different games, PlusMusic is worth a look. It can use adaptive audio technology that synchronizes music with the game's changing situation, for example, for a more immersive experience. With a library of more than 400,000 songs, you can pick from three different playback modes and set defaults for specific games. The service also lets you create your own playlists and offers a Premium subscription for access to the full music library and ad-free listening.
Another service worth a mention is PlaylistAI, which uses AI to generate playlists across multiple music services like Spotify and Apple Music. It's not geared specifically for gaming, but its smart suggestions and custom playlist generation based on your preferences could be useful for generating playlists that match your mood and gaming actions. You can generate playlists on the fly with a text description, so it's a good tool for customizing music.
If you're deeply into Spotify, Playlistable is a good way to generate playlists based on your mood, favorite artists or listening history. It includes Song Match and Artist Match tools to find new music, and you can customize the playlists it generates. The service is integrated with Spotify, so you can save and retrieve your playlists right on the music service.