I guess the one interesting point according to the PixelButts guy is that they were storing the next game after the prior game, so the HACKERMANS knew where they'd put what would be stuff for Last of Us 2 once it came time. Presumably it wasn't stored on the server as "LAST OF US PART TWO COPYRIGHT NAUGHTY GODS DO NOT STEAL" but they figured out how prior games' files went after each other and were able to parse it out.