Right now you can get a 12-month subscription of Xbox Live Gold on sale for $53. The deal is at CDKeys.com.
An Xbox Live Gold membership includes free Games with Gold titles each month. Xbox Live Gold is also required to play Xbox One games online.
Jurassic World Evolution, Insane Robots, Toy Story 3, and Castlevania: Lords of Shadow – Mirror of Fate HD are the Xbox Live Games with Gold free games for December 2019.