a good RPG has innovative, yet intuitive and balanced gameplay...
a great game also has a captivating story...
and the best games are also vissualy attractive...
to many games that try to cover the lack of either or both of the first two with pretty pictures though.
But again that's my personal opinion...
Your parents get home, the police or firefighters arrives on the scene or maybe cause food poisoning on your guests
but I suppose you are referring to the game... so you need to take the girl scavenging and return home... not sure if the party ends if a story event forces you to return home