Game Development Dictionary
For instance the "Quest" archtype is a common adventure game plot archtype. As part of the "Quest" archtype, character X must save the world from evil by retrieving/ destroying/ the magical object/person/ thing Y. X starts off as an inexperienced person but his quest will bring an new maturity to him.
Character Archtypes are often followed. The "Princess" the "Rogue Warrior", the "kind old wizard" are some examples that can be easily recognised.
By using archtypes as part of a story design, a user can instantly gain a feel for the story, and can gain an instant insight into the interactions between characters.