The free games available to Xbox Live Gold subscribers for May 2018 have been leaked a little early.
Super Mega Baseball 2 – May 1-31 (Xbox One)
Metal Gear Solid V: The Phantom Pain – May 16 to June 15 (Xbox One)
Sega Vintage Collection: Streets of Rage – May 1-15 (Xbox One, Xbox 360)
Vanquish – May 16-31 (Xbox One, Xbox 360)
