Xbox 360 games with Xbox Live Gold can download Just Cause 2 for free from June 1-15. The open-world action game sequel from developer Avanahe Studios and publisher Square Enix is normally priced at $14.99. From June 16-30, Xbox 360 owners can get Thief for free. The stealth action game also comes from publisher Square Enix and is normally priced at $29.99.
Xbox One owners with Xbox Live Gold can download Massive Chalice from developer Double Fine Productions, for the entire month of June. Massive Chalice is a turn-based strategy game that is making its debut next month as well and will normally be priced at $19.99. Here's a quick description:
"An early Kickstarter success, Massive Chalice is a tactical strategy game set in an epic fantasy world. You step into the shoes of the Immortal Ruler, and your goal is to defeat a mysterious enemy known as the Cadence, in a war that will apparently last 300 years. Yes, that's a pretty freakin' long time, but you've got plenty of troops to command, marriages to forge, and bloodlines to uphold. An immortal's gotta keep their multi-generation war machine fit and fresh, after all!"
In addition, Pool Nation FX, which is currently free for Xbox Live Gold members on the Xbox One, will continue to be free for those users for the entire month of June.
Source: Major Nelson