This is my first review ever so here it goes. I'm mostly doing it, because after I finished catching up to this I though "How the hell doesn't this amazing series have a anime yet".
This is a two part series. Read the first part before reading this. The second part is superior, but only because, the first part gets you used to the concept of the series and introduces you to quite a few characters that end up becoming a part of series two.
When I started reading this I was disappointed, because part 1 had different characters and was ended on a cliff hanger and you did find out what happens to those characters until around chapter 100 with only getting brief glimpses of them up until that point. I must say it didn't take long for me to get over that and enjoy this series, because as much as I liked part 1 this one introduce a lot more characters and had way better character development then the ones in part 1. (Though I think it mostly, because this one has such a wide variety of characters.)
What is the Story - A unknown person shows up with supernatural godlike powers. All children from 15-18 are forced to play deadly children games (Jump Rope, Red Light/Green Light, Musical Chairs, etc.) until according
to them someone replaces them as god. At the start of the series you don't how many people can win these series of games. The only thing we know is that all across the world these children have to play.
Story and Art 8/9 - The story is good as of now, but it could be even better in time. The author is holding back a lot of information and focusing more on his characters. The best part of this story is how UNPREDICTABLE it is. Character plot armor is non-existent in this manga. The art is fantastic. I would give it a 10, but very rarely some character designs aren't as good as others. I will say it has some of the best visuals I've ever seen though.
Characters - Death. There is a lot of death in this manga. So you think it would be filled with fillers characters to get killed off. Once and awhile he gives you one, but almost all the time all these characters backstory are filled out eventually, or their personalty is shown to the reader. He flesh's out all these characters so well. Sometimes they die right away, or survive for 100's of chapters for a shocking death later on, but so many deaths have so much impact not just because they are sad though. Somehow in a manga filled with death so many deaths come across hopeful, or the character who dies stands tall with no fear in face of the cruel godlike beings. It tricked me at the start with having many characters come across as bad/evil, but the real bad guys of course are these so called "gods". Some of these characters come across as psychopaths or insane people, but 100 chapters later you can't believe how invested you are in the characters you initially hated. So many memorable deaths and character moments of bravery I can't even count.
Shun is the MC of part 1. He has one goal to kill the god(s). Akashi is are MC in part 2. While the first part lacked hope part 2 has hope because, Akashi has one goal. Win so he can revive everyone that died.
Enjoyment - At first I was reading the manga for the shock value and how unpredictable it was, but the ending for part 1 was so good I had to start part 2. Part 2 is a slow start, but then blows part 1 out of the water with its characters and the eventually crossing paths of the 2 parts is so satisfying. It goes from being depressing for seeing characters die to moment after moment of these characters defying the odds and going against these so called "gods". All the arcs are good, but two arcs in particular stand-out.
Rock, Paper, Scissors is the most intense arc I've ever read. It was at this arc which is about 50 in did I understand how good this series was.
Cops and Robbers - One of my favorite arcs of all time. Characters get split up, but this arc not only has them all in one place, but introduces many more exciting characters.
That's it. Read this. It needs a anime. This also had the most rewarding punch in any story ever. You'll know what punch when you get to it.