For the month of November, Xbox Live Gold members will receive four new free games – two on Xbox One and two on Xbox 360 – as part of the Games with Gold program.
And starting in November all future Games with Gold titles for Xbox 360 will be playable on Xbox One, giving Xbox One owners double the free games to play each month.
http://majornelson.com/2015/10/28/xbox-live-games-with-gold-for-november-2015/?linkId=18315983