Actually I have a game I've been mulling over in my head for several years, even have a name for it.
The Devil Made Me Do It
Its pretty standard really. Set on an island/port in a medieval period.
Boy/idiot saves girl/princess from evil warlord/vampire.
Since the protagonist is a dufas he needs a bit of help from a shadowy figure to eventually become an all out badass.
Throw in some ulterior motives, and a bit of semi turn based actions for a dungeon crawler that starts out in the jungle, runs to peak of a snowy mountain, and down to a lava filled finale.