Microsoft has announced August's Xbox Live Games with Gold titles.
On Xbox One, Xbox Live Gold members can download Hideo Kojima's Metal Gear Solid 5: Ground Zeroes for free during the month of August. That should keep you going until Metal Gear Solid 5: The Phantom Pain comes out in September.
Meanwhile, How to Survive: Storm Warning Edition will be available as a free download on Xbox One from 16th August to 15th September.
On Xbox 360, Xbox Live Gold members get horror shooter Metro 2033 from 1st August to 15th August. Its sequel, Metro: Last Light, will be free to download from 16th August to 31st August.