Microsoft has announced their September 2015 lineup of freebies coming to Games with Gold.
On Xbox One, The Deer God will be free from September 1st through the 30th. Following this, Tomb Raider: Definitive Edition will be free from September 16th through October 15th as a preemptive gift to fans waiting for the upcoming Rise of the Tomb Raider.
Finally, on Xbox 360 Battlestations: Pacific will be free from September 1st through the 15th, as well as Crysis 3 from September 16th through the 30th.