I only kill enemies if I have no other choice and for the fun of it. Why have a knife if I won't use it? With that aside, I'm also trying to play it kinda stealthy because I don't want to be a clumsy assassin, I want to be that 'knife in the dark'. Most of the time I'm trying to do non-lethal takedowns, choke them out or shoot them with sleeping darts to knock them out. I only use the pistol if it's really necessary, I like the crossbow better, less effective, yes, but it's a silent weapon, at least.