Xbox one: not backwards compatible.each game you buy is registered to your account, stopping the sale of used games, unless you buy an unlock code online. This also stops friends from lending games to each other. You must be online with this system, even if u want to play offline by yourself…guess what you can’t. And to top it off…it comes with a camera and a mic which are always ON. You cannot turn them off. BIG BROTHER much? So all in all, I guess when my Xbox goes I’m done gaming.