https://www.gamespot.com/articles/last-chance-to-get-these-free-xbox-one-and-xbox-36/1100-6456110/

Somehow, it is already the middle of January, so that means now is your last chance to grab the first of January 2018's free Games With Gold titles.

On Xbox One, you have until the end of the day to pick up Telltale's Back to the Future: The Game, while time is running out to grab Tomb Raider: Underworld. Both games will be free for the rest of the day before they are replaced by others on January 16.