The first Games with Gold selection for 2018 has been revealed, and it seems like Xbox is running out of games to give away for free.
The Xbox One titles available for free through Games with Gold include The Incredible Adventures of Van Helsing III, which will be available from January 1st to January 31st, and Zombi, the survival-horror game that started as a Wii U launch title, which will be available for free from January 16th to February 15th.
As for Xbox 360 games, Tomb Raider: Underworld will be available for free from January 1st to January 15th, followed by Army of Two, which is available for free from January 16th to January 31st. Both games are backward compatible.
Games with Gold requires an Xbox Live Gold membership in order to scoop up the free games (if you even want them). You still pick up Warhammer: Endtimes — Vermintide and Marlow Briggs and the Mask of Death until December 31st.
Source: Xbox Wire