Microsoft announced the "free" Games with Gold for August 2017 on both the Xbox One and Xbox 360. These games include Slime Rancher, Trials Fusion, Bayonetta, and Red Faction: Armageddon.
Slime RancherTrials FusionBayonettaRed Faction: Armageddon
Save Mars from an ancient evil (that you accidentally unleashed) in Red Faction: Armageddon. After a half-century of peace on Mars, the Red Faction resistance is called upon to save Mars from destruction. Survive hordes of enemies with friends in co-op or battle across the red planet in an epic solo campaign.