Microsoft is doubling down on its Games With Gold initiative by offering two free Xbox One games per month for Xbox Live Gold members.
As such, Gold subscribers in July will receive Assassin's Creed 4: Black Flag for the duration of the month on Xbox One, along with puzzle/platformer So Many Me from 16th July through 15th August.
On Xbox 360, folks will get Plants vs. Zombies from 1st - 15th July, while that will later be replaced with Gears of War 3 from 16th-31st July.
July represents the second anniversary for Games With Gold. While the last couple of months have thrown in a second Xbox One game with Pool Nation FX, this is the first time Microsoft has confirmed this will be the norm going forward.
You still have until the rest of June to snag Massive Chalice and Pool Nation FX on Xbox One, along with Thief on Xbox 360.