It was kinda slow and kinda hard at first but once was I got the ball rolling it was hard to stop and ended playing it for about 2/3 hours and was able to finish it and killing Vira Cocha (with a lil grinding of course)
But I dont know if it glicthed or not but It doesnt show that I got spme of the NG medals even though I got them in-game (http://img692.imageshack.us/img692/4 043/sadfacev.png) I just need the last one but I dont like playing the game again. I thought challenge was gonna be a Boss marathon fight or something not just a harder mode. =(
Oh and after I beat Vira Cocha he gave me 300k Au, not sure if that was suppose to happen or not since the other monsters only give like 250-1k Au. And all the medals/awards after him are missing/dont show up. =/
great game though. I would definitely like to play a sequel or just another adventure with new story/characters.