Target has a daily deal on Fable III for XBOX 360 for only $10 shipped (reg. $19.99). This RPG is rated Mature. It has gotten some pretty good reviews.
Here is a little bit about the game: The journey to rule the throne of Albion begins five decades after the events of the last chapter, and you play as the child of your hero from Fable II. As you rule your kingdom as king or queen, you will be called upon to make choices and sacrifices that will test your morality and can affect your entire kingdom. Themes of heroism, leadership and consequence are taken to a grand scale as you fight to unite a divided people.
This deal is only good for today. Just scroll down the bottom of the daily deals page.