Ends 1/31. Microsoft Store has the Resident Evil 2: 1-Shot Demo (Xbox One) for $0 downloaded. Also available at the PlayStation Store (PlayStation 4) and, Steam (PC). This demo offers a full 30-minutes, but be warned, you only have 1-shot.
Alternatively you try out the Dead or Alive 6 Beta (PlayStation 4) for $0 downloaded.
Gold Membership gets you access to new content and deals like free Xbox One games.