May’s set of titles for Games with Gold will include CastleStorm: Definitive Edition and Pool Nation FX on Xbox One.
Pool Nation is carried over from last month, whilst CastleStorm is a super genre mashup mixed with tower defense elements! It also has co-op and multiplayer.
Meanwhile, Xbox 360 owners can grab Mafia II for free on May 1st until May 15th, with F1 2013 taking over until the end of the month.