I only started to watch it with episode 1. Pretty weird stuff, very Korean - well naturally it is.
I also wonder how they gonna keep up the suspense over many episodes. Different games, but basically the same principle. And if they keep going like in the first episode, they will run out of players soon.
What made me curious is the question, who organises the whole thing. Obviously someone similar to a James Bond villain type of person, with loads of money and a matching island as a base.
It reminded me vaguely of some movies I saw years ago, the "Gantz" movies from Japan. Perhaps you know them? Based on a Manga series, also far out stuff.