Story: 4
The story is the poorest aspect of this manga. What starts off seemingly interesting with terrorists, high schoolers and zombies turns out to be a disappointment. The story first focuses on gruesome simple games, then zombies, and then on the actual scenario involving the different parties. This eventually becomes a mess the author solves with a huge mayhem, leaving behind loads of plotholes. On the plus side, if you love action you won't be disappointed.

Art: 7
That's the best part of this manga. Its strongest point story wise is the amount of action, and the art depicts that action beautifully. The emotions and movements are both clear, however the characters lack details.

Character: 5
The characters are overall generic and hard to distinguish from each other. There are too many characters and it is thus hard to feel anything when one eventually dies, the manga focusing itself on action instead of character development or scenario. However there are some few interesting characters / villains (Mask & Nerd guy).

Enjoyment: 6
It's fine to read this series to pass time, thanks to its high amount of action, which is actually enjoyable since it allows you to ignore the poor scenario.

Overall: 5
This is overall a series you can afford to read, especially if you love action, zombies and guns, but it's not really worth your time either, since you probably won't gain any remarkable memory or idea from it.