It's pretty hard to describe how this all comes together. Especially since we're used to video games being video games and movies/TV series being just that. Except that line is so blurred now.
Besides being profoundly entertained and thinking hard about the metaphor of how humans react in an apocalyptic event... I honestly found myself preferring a 20 hour game - over any TV series Hollywood can throw at us.
Even if you're not a gamer. And if you can stomach a little violence - all extremely purposeful in terms of creating the atmosphere and character relations... Get this.