That actually makes me wonder... for a... ''pacifist'' playthrough, how many things do you have to kill? Three, four or five?
Couple of arena fighters, a mushroom and a big eye.
epeli, I think you are missing some... Newton in the beginning (by lying to him about the bugs) or alternatively the bugs to save Newton. Apart from the Arena fight, the Oligarch quest lines also require killing. JKK can be done with only killing Bogdan, so the headcount is a little bit bigger. Don't know about Expedition, though... and I've never tried whether the first Arena missions would be doable as a bystander letting the other challengers dirty their hands