The actual release day is now [B]Sept 2nd
http://www.gamestop.com/browse/searc...ds%20of%20Prey
It is very shocking, and very, very rare that a game that is only 2 weeks away gets bump up a week(or in this case 6 days), but it is 100% legit.
When a game is this close to release, and Gamestop changes a date you
can absolutely 100% take it to the bank. They are never wrong when a release date is this close.