As mentioned on the Majornelson site:
Starting Tuesday (April 1st) Hitman: Absolution (Normally US $19.99) will be free for Xbox Live Gold members through April 15th.
Then on April 16th, Xbox Live Gold Members can download Deadlight (Normally US $14.99) for free through April 30th.
The “Games With Gold” program gives Xbox LIVE Gold Members 2 free games to keep each month. A new title will