This deal is only available at bestbuy.com. Buy 2 Greatest Hits titles, receive the 3rd for FREE! Heavy Rain, God of War 3, Resident Evil 5, and Uncharted 2 are all on the list just to let you know.
HERE IS THE LINK <- Click
At the time of this post, Uncharted 2 is back ordered.
**EDIT: This offer is available for the US only. I contacted Best Buy to confirm.