The Last of Us Part 2 is the biggest game Naughty Dog have made to date, but it is not, of course, open world.
Speaking during IGN’s Beyond podcast (via PlayStation Lifestyle), creative direction Neil Druckmann said the The Last of Us Part 2 was originally going to be open world with multiple hubs.
WARNING: Major spoilers ahead for The Last of Us Part 2.
However, earlier on in development, The Last of Us Part 2 was originally going to be a much bigger game.