Will NPC's have some form of skill tree, a basic version of the main character's. The only reason I ask is the idea of being shot in the face by someone in a house I'm breaking in to. If they've no aiming skill then the gun would go off but the odds of being hit are slim, the odds of being killed even slimmer. However the noise will still attract nearby zeds, some sort of shouting dialogue could take place to prevent further fighting and worse case scenario (okay, second worse case after death) you're wounded and so move at the same rate as being over encumbered making escape from approaching hordes that much more difficult. Would it be possible to tend to the wound? If it's "through and through" then could the wound be cauterised and bandaged? A bullet lodged in there could turn septic and cause serious illness. Could first-aid become a skill set, resulting in a medical NPC being like gold in your group. Or a player becoming a well trained field medic resulting in much less hostile NPCs? I'm well aware the first NPCs may still be limited in what they do (although an entire evolutionary stage further than the 1.5 NPCs running wildly into zombies) so I'm not expecting miracles. I just hope it's not a case of "meet a trusting NPC, no problem. Meet a suspicious NPC, head shot and you're dead" (like the shotgun prick from the tutorial, I hated that guy)