It is kinda like "Lord of the Flies", meets "I Am Alive: Surviving the Andes Plane Crash", meets a disaster movie.
Firstly, the effects are pretty good, and it is hard to tell what is practical and what is CGI for most part. There's not many studios out side Hollywood who can pull off these types of effects movies, and South Korea is certainly competing and catching up with them.
It is a psychological study of people in a crisis situation, and how you would react and what depths they would stoop to to survive.
It is well crafted, but there are some areas which you could only describe as major loop holes. I mean South Korea is a technically advanced nation, so where is the government within all this and the rescue operation. Even if the whole country was affected by the quake, there would be international aid. There is no explanation to why they are still in exactly the same position 2 months later.
Still, if you can put that aside, its an enjoyable disaster movie with plenty psychological twists.
