who developed it?
Naughty Dog
The Last of Us
Naughty Dog 
how many chapters are on the last of us UNANSWERABLE what does it refers to? It  is a 2013 action-adventure game
wiki:11420606
The Last of Us [SEP] Introduction
The Last of Us is a 2013 action-adventure game developed by Naughty Dog and published by Sony Computer Entertainment. Players control Joel, a smuggler tasked with escorting a teenage girl, Ellie, across a post-apocalyptic United States. "The Last of Us" is played from a third-person perspective. Players use firearms and improvised weapons, and can use stealth to defend against hostile humans and cannibalistic creatures infected by a mutated fungus in the genus "Cordyceps". In the online multiplayer mode, up to eight players engage in cooperative and competitive gameplay. Development of "The Last of Us" began in 2009, soon after the release of Naughty Dog's previous game, "".