Xbox Live Gold members can download some really nice titles for free in October.
For Xbox One owners, Valiant Hearts: The Great War will be free during the month of October. The Walking Dead: The Complete First Season will be available as a free download from October 16 through November 15.
Xbox 360 users can download Metal Gear Solid 5: Ground Zeroes for free from October 1-15. Come October 16, The Walking Dead: The Complete First Season will be free through October 31.
More information is available through Major Nelson's Blog.