Microsoft's Larry 'Major Nelson' Hryb has detailed the Games with Gold offerings for December on his blog.
Throughout all of December, Xbox One owners with a Gold subscription will be able to download Worms Battlefields for free. Those on Xbox 360 can download 60s themed caper The Raven: Legacy of a Master Thief until December 15th, after which it will be replaced by SSX until the end of the month.
If you haven't done so already, now would be a good time to grab November's offerings of Volgarr the Viking and Red Faction: Guerrilla.
Sony has also revealed the contents of the PlayStation Plus Instant Game Collection on PS4, PS4, and Vita for December, with games including Injustice Gods Among Us, Deadly Premonition, and Hitman HD Trilogy featuring.
