https://www.gamespot.com/articles/get-one-of-septembers-xbox-one-games-with-gold-fre/1100-6461519/

It's not quite September yet, but you can already download one of the new Xbox One Games with Gold for September 2018. The game is Prison Architect, and it's available for Xbox Live Gold subscribers between now and September 30. You can grab it here.

As you can probably tell from the title, Prison Architect puts you in charge of a prison. You get to design the layout of the building and manage how the occupants are treated. You can aim to make your prison a pleasant place designed to rehabilitate the criminals within, or you can give into your darker urges and inspire things like arson, murders, and riots.