Ok i got one, the story is a cop is on the hunt for a killer, when following him into public areas such as mall, subway or shop the place becomes dark and isolated with deamons etc.(Silent hill style) over time he continually engage with the killer, each time discovering more about why u hate him. Their be moral moments such as persue the killer or safe the woman form the monster. Their could be two gameplay styles you can choose Action(Resident evil 5/L4D style) or survival horror(SH/Siren). The main character will take damage over time to look more and more like a killer himself(Scars, bruses, dirty cloths)