Harmonix (the creators of Rock Band) have long had a system called the Rock Band Network where bands could chart their own songs and submit them for inclusion in the Network. Players could then grab the tracks and play them locally, supporting the musicians in the process.
I'm happy to report that "Discord (The Living Tombstone Remix)" by Eurobeat Brony has made it onto said network! This marks the first time that a pony song remix has made it onto a major game and it's pretty freakin' sweet. If I could still play Rock Band to save my life, I'd pick this up. You should do it for me.
You can find the press release here, and a video preview of the tracks below the break.