the gust games on ps2 are lot of fun as they are usualy choke full of subsystem's and gimmick's (especialy item crafting,there is item crafting in every single gust game) there are 3 series,atelier iris which is mostly bland rpg fantasy with the first game being awfull,the second one being "eh" and the third one being good on top of having a nice job system that stems out from the usual "warrior,wizard,thief" trinity
then you have ar tonelico which is about wizard girls that get stronger the more they get uguu to the point the game is full of double entendre like "this is my first time but i don't mind if it's you

",the first one is turn based,the second one uses a system similiar a watered down valkyrie profile although the second one is probably one of the worst translation NIS has ever done
and lastly you have mana khemia which is animu harry potter which i think it's the best game they released and always suggest when it comes to talking about them,there are 2,the second is good too but i like the first one better
it's a shame i still haven't find a ps3,i will never be able to get my pedogroove on
