This January the Games with Gold program will allow Xbox One players to download Killer Instinct: Season 1 Ultra Edition and Zheros. Xbox 360 players will be able to download Dirt Showdown and Deus Ex: Human Revolution.
On January 1, Xbox Live Gold members will be able to download Killer Instinct: Season 1 Ultra Edition and Dirt Showdown; Killer Instinct will remain free for the duration of January while Dirt Showdown will only remain free through January 15. Zheros and Deus Ex: Human Revolution will be become free to download on January 16; although Dues Ex will only remain free until the 31 and Zheros will remain free into February. All of January’s 360 Games with Gold selections will be playable on Xbox One through the backwards compatibility program.
Source: Major Nelson
