Xbox Live Gold members will be getting three free games in March 2015. Each game is actually of quality too.
For Xbox One Gold members, Rayman Legends will be free all month long. This title normally sells for $40. #IDARB is also scheduled to be free, a carry over from last month.
Xbox 360 Gold members will be able to download Tomb Raider (normally $20) through March 15th. Then Bioshock Infinite (normally $30) will be free from March 16th-31st.