The lice have acquired a licence to kill. In Itchy Monkey: Licence to Kill, players receive three new lice who can infiltrate monkeys of an opponent. If a spy louse jumps (or bumps) to a monkey containing lice of an opponent, all of the lice will stay on that monkey. From now on that "spy louse" counts towards the number of worker lice on that monkey. A monkey may contain only one spy louse at a time. This expansion also gives you a new game mode in which you control a species of monkeys. (Yes, you won't be playing as lice.) The goal of this game mode is to be the first player to get rid of all of the lice colonizing your monkeys. —description from designer