Q u o t e: ...or gain his trust and kill him in a different way.
As for the action, it doesn't have to be that way all the time does it?....
You've got to to think of it as a co-op game how can you side with meph while your party members hack him down while you and him have coffee? Really I mean really?
Single player games like you suggest are only going to be on the console. There is no market in single player computer games.