For the next five seconds, think about how many people you know. Five, four, three, two, time's up! How many could you come up with? Seven, or maybe nine hundred? Neither of those very good numbers come even close to touching the number of copies The Last of Us Part II has sold. That very good number? Over 4 million! Holy fungal zombies! Naughty Dog and Sony have delivered another blockbuster in their third-person action-adventure sequel; no small feat given how polarizing, emotionally devastating, and unprecedentedly uncompromising the game is (can you imagine Michael Haneke's's …