▁of ▁different ▁character ▁classes . ▁While ▁only ▁five ▁characters ▁can ▁be ▁in ▁the ▁party ▁at ▁a ▁single ▁time , ▁a ▁much ▁larger ▁number ▁can ▁be ▁created ▁and ▁kept ▁in ▁waiting ▁back ▁at ▁the ▁" gu ild ▁hall ". ▁Char acters ▁can ▁be ▁switched ▁in ▁and ▁out ▁of ▁the ▁party ▁when ▁in ▁town , ▁so ▁if ▁a ▁given ▁special ty ▁is ▁needed ▁for ▁a ▁specific ▁obst acle , ▁the ▁party ▁can ▁be ▁tail ored ▁appropri ately . ▁The ▁player ▁alloc ates ▁skill ▁points ▁to ▁specific ▁skills ▁during ▁level ▁adv ancement . ▁ ▁Development ▁▁ ▁The ▁title ▁was ▁first ▁announced ▁by ▁Atl us ▁through ▁Fam its u ▁after ▁demonstr ating ▁it ▁behind ▁closed ▁doors ▁at ▁E 3 ▁ 2 0 0 6 . ▁ ▁The ▁development ▁team ▁within ▁Atl us ▁was ▁led ▁by ▁K azu ya ▁Ni in ou ▁who ▁also ▁directed ▁the ▁development ▁of ▁Atl us ' ▁first ▁in - house ▁game ▁for ▁the ▁D S , ▁Tra uma ▁Center : ▁Under ▁the ▁Kn ife . ▁The ▁game ▁features ▁character ▁designs ▁by ▁Yu ji ▁Him uka i , ▁mon ster ▁design ▁by ▁Shin ▁Nag as awa , ▁a ▁story ▁by ▁Sh ige o ▁Kom ori , ▁and ▁FM - like ▁music ▁by ▁Yu zo ▁Kos hi ro . ▁ ▁The ▁game ▁was ▁originally ▁to ▁be ▁released ▁intern ation ally ▁as ▁Y gg d ras il ▁Lab yr inth , ▁but ▁was ▁renamed ▁to ▁avoid ▁any ▁possible ▁confusion ▁with ▁Y gg dra ▁Union ▁( a ▁game ▁published ▁in ▁North ▁America ▁by ▁Atl us ▁a ▁year