i recently bought the game instending to play for only an hour or so as a time filler but as soon as i started i was hooked the story is simple your a scout competing in the scout compition scotuing is how u tame monsters the stronger your monsters are then the ones you wish to tame the better chance u got and the fact u can steal other peoples monsters is all the better thou the game does have some parts where they dont realy tell you where to go and it takes some time to figure out finishing the majority of the story line is very difficult there are 3 end game fights which you seriously have to get powerful grade monsters (monsters strength is measured in grades f e d c b a s x as well as in stat points) for and grind up heaps even after about 10 hours of grinding for the 1st of the final 3 killer battles i couldnt beat the last boss and took some more grinding this is one of those games that take awhile to get kick started and have some annoying parts to it like sythesising (breeding) monsters if u breed 2 lvl 30 high grade monsters u get the same grade or higher grade monster at lvl 1 and u have to grind it up again thou it can be worth it becuase they end up with better stats the battle system is 3 monters in battle all in all if u got some spare time its a very fun game