    """
    All available quest objectives.
    """
    def __init__(self):
        # finish a dialogue, object: dialogue_id
        self.dict = {
            defines.OBJECTIVE_TALK: {
                "name": _("Talk to someone. (The object is the NPC's key.)", category="quest_objective")
            },
            # arrive a room, object: room_id
            defines.OBJECTIVE_ARRIVE: {