Guys, seriously.... Microsoft has begun the backwards compatibility list for Xbox, I'll link the list at the end. More importantly, as of now they have given access to Witcher 2: Assassins of Kings for free on Xbox One and 360 from January 21st until February 5th. Even better, it's not like one of those deals where: [My best speed talker impression] This offer only applies to people born outside on a Wednesday under a 200 year old oak tree with no more than three witnesses during a thunderstorm and along side a stampede of Zebra running East.
If you're one of those who didn't play Witcher 2, then I would I advise that you resolve that issue and get yourself a copy. It's an excellent title and it will help some things in Witcher 3 make a little more sense. It's FREE, people!
You can see the titles added to the Backward Compatibility List here. And keep an eye out there for more to come.