As far as I know there is no such game.   
  
Anyway, my suggestion is to make a game where the main storyline is more or less linear, but where you can affect other characters in the game in a meaningful way. for example, a story where a side character suffers some sort of personal tragedy and the way that character reacts to said tragedy is determined by your actions towards him/her. Perhaps such a game would be a bit less expensive to develop.