Microsoft have now confirmed the free Games with Gold for May 2016. As always, Xbox Live Gold members will be able to download four new games; two on Xbox One and two on Xbox 360. First up on Xbox One is Defense Grid 2 which will be available to download for free during the month of May. Then we have Costume Quest 2 which will become available as a free download from May 16th to June 15th.
On Xbox 360 starting May 1, GRID 2 will be free for Xbox Live Gold members through to May 15th. Then on May 16th, Xbox Live Gold Members can download Popcap’s classic Peggle for free until May 31st. Remember each of the Xbox 360 games can also be enjoyed on Xbox One via the Backwards Compatibility program.
Source: Major Nelson