Lately, I've been playing the game Metal Gear Solid, which is a game focused on espionage. In the game, the way that I prefer to play is such that the playable character is fine with harming the enemy; for example incapacitating them with hand to hand combat, using a tranquilizer gun on them, or holding them up at gun point, but not fine with murdering them.
Is there a word that exists to describe an opinion that violence is fine to accomplish a task, but not murder? For one to be pacifist necessitates that one is against all forms of violence, including that which does not end the life another, so that didn't quite fit.