Microsoft has announced this month’s Games With Gold line-up: tower-defense brawler mashup CastleStorm: Definitive Edition (May 1-31 on Xbox One), third-person action game Mafia II (May 1-15 on Xbox 360), and open-wheel racing sim F1 2013 (May 1-31 on Xbox 360).

On top of that, Pool Nation will remain available on Xbox One for another month.