On Xbox One, Xbox Live Gold members can download Rayman Legends ($39.99 ERP) for free during the month of March. On Xbox 360, starting Sunday, March 1st, Tomb Raider ($19.99 ERP) will be free for Xbox Live Gold members through March 15th. Then on March 16th, Xbox Live Gold Members can download Bioshock Infinite ($29.99 ERP) for free through March 31st. Source : Xbox Live Games with Gold for March 2015 - Xbox Live's Major Nelson
Some very good games this month, even more so when compared to past months. I own Tomb Raider on PC, however will download Rayman and Bioshock, then probably never play them as i dont have time to lol.