Once delisted in an attempt to "clean up Sonic's public image", the greatest game of our generation has been relisted on the US Xbox Live Marketplace for just $4.99. It's unfortunately not backwards compatible on the current series of Xbox consoles, but if you've wanted to own a copy of this game to play on your 360 for whatever reason you can currently do so. No idea if this is a mistake or not so you might want to grab it quick if interested.
https://marketplace.xbox.com/en-US/...77fe-1000-9115-d802534507d6?DownloadType=Game
https://marketplace.xbox.com/en-US/...77fe-1000-9115-d802534507d6?DownloadType=Game