"We can confirm that Amy Hennig has left Naughty Dog," A Sony representative told IGN. "Amy has made significant contributions to the game industry and we appreciate all she has done for Naughty Dog. The development timeline of Uncharted will not be impacted."
Hennig served as the creative director for Uncharted: Drake's Fortune, Uncharted 2: Among Thieves, and Uncharted 3: Drake's Deception, and she also penned the script for the three games. She was understood to be reprising her role for the Uncharted PS4 game.
Neither Hennig nor Naughty Dog have commented, but IGN sources claim the writer, a Naughty Dog veteran of more than ten years, was "forced out" by The Last of Us directors Neil Druckman and Bruce Straley, and the pair may take over the Uncharted series. Hennig worked with Druckman and Straley on the first two Uncharted games, before the two men switched to developing The Last of Us.