For the month of July, Xbox Live Gold members will receive four new free games – two on Xbox One and two on Xbox 360 – as part of the Games with Gold program. You can play both Xbox 360 titles on your Xbox One with Backward Compatibility.
On Xbox One, Xbox Live Gold members can download The Banner Saga 2 ($19.99 ERP) for free during the month of July. Tumblestone ($19.99 ERP) will be available as a free download from July 16th to August 15th.
On Xbox 360, starting Friday, 01 July, Tom Clancy’s Rainbow Six Vegas 2 ($19.99 ERP) will be free for Xbox Live Gold members through July 15th. Then on July 16th, Xbox Live Gold Members can download TRON: Evolution ($14.99 ERP) for free through July 31st.
Source: Major Nelson