After Microsoft surprised many with the reveal of Xbox 360 backwards compatibility coming to Xbox One gradually over the course of the year, two particularly beloved titles from the Xbox 360 generation are making their way over to Xbox One Preview Program members by the end of the day.

Microsoft's Larry Hryb (aka "Major Nelson") revealed that both Gears of War and Shadow Complex will be arriving as backwards compatible titles later today for members of Xbox One's Preview Program members, allowing owners of either title previously on Xbox 360 to play each title for free on Xbox One.

Hryb confirmed that both titles will be available later today, August 3rd, for members of the Preview Program, while also confirming that both titles will be available through Xbox One's backwards compatibility when it launches publicly this fall. During its E3 presentation this year, Microsoft confirmed that over 100 titles would be available for the service by the holiday season.

Update: The Coalition's Studio Head Rod Fegusson posted an update mentioning that Gears of War won't be available today. On the other hand, Shadow Complex is already playable.

Update 2: Apparently it did happen today. Gears of War has just started installing on my Xbox One. If your disc was already in the drive, you'll have to eject it and insert it again for it to work.