"This is our largest Uncharted game to date, and the team has been working incredibly hard to meet the challenge of closing out the game’s development in a timely manner. However, as we approached our final deadlines and started wrapping up the game’s levels, we realized that several key sequences needed extra resources to bring them to the finish line," said Naughty Dog's Neil Druckmann & Bruce Straley on the PS Blog.
"After carefully considering all of our options, we decided to extend our schedule, making sure that we get a few more polish passes before submitting our gold master (the final disc for manufacturing).
"Pushing the date is not an easy choice, and we wouldn’t do it if we didn’t feel in our hearts it’s the best course of action for the game. To you, our loyal fans, we hope you’ll accept our sincere apology. We know many of you have been waiting patiently for Nathan Drake’s final chapter, and now we humbly ask you to wait a bit longer."