Update: Microsoft officially revealed the line-up, and indeed the leak proved to be correct.
The games that will be provided at no additional cost in May are Defense Grid 2 and Costume Quest for Xbox one and Grid 2 and Peggle for Xbox 360.
You can check out a trailer (and the original post) below.
Today a picture appeared on Reddit showcasing what appears to be store in-advertisement for the Games with Gold promotion giving an overview on May’s free games.
Portrayed, as you can see below, are Defense Grid 2 and Costume Quest for Xbox one and Grid 2 and Peggle for Xbox 360.
While this isn’t certainly the first time this happens, and the image seems credible, you should take this with the customary grain of salt until officially confirmed by Microsoft.