Play together with Xbox Live Gold. May's 2018 Games with Gold lineup for Xbox One includes:

Super Mega Baseball 2 (May 1st - May 31st)

Metal Gear Solid V: The Phantom Pain (May 16 - June 15)

For Xbox 360 owners (and through Xbox One backward compatibility), May kicks off wit:

Sega Vintage Collection: Streets of Rage (May 1 - May 15)

Vanquish (May 16 - May 31)

May's lineup provides over $79 dollars in value and up to 3400 in gamerscore.