https://www.gamespot.com/articles/januarys-free-xbox-games-with-gold-are-available-n/1100-6455830/

The first of January 2018's free Games With Gold titles for Xbox One and Xbox 360 are now available for subscribers. On Xbox One, the action RPG The Incredible Adventures of Van Helsing III is completely free all month long. You play as the famous monster hunter on a journey to take down one of your toughest foes yet.

On Xbox 360, Square Enix's Tomb Raider Underworld is now available for the low, low price of $0.00. Note that this game plays on Xbox One through backwards compatibility, so Xbox One owners can pick it up as well. One of December 2017's free Xbox One Games With Gold titles, Back to the Future: The Game, remains free until January 15.