Indeed, many games exist, both wargames and hobby games, that include cyber operations (e.g., on critical infrastructure). Here, the “cyber” in “cyber deterrence” refers to the type of punishment one is threatening. Here, the “cyber” in “cyber deterrence” refers to the type of action one is trying to deter. Our Tantalus wargame data offers us good news on this front: Cyber operations can be deterred. A Cyber Deterrence ParadoxWhile it is possible to deter cyber operations from other parties, players reached for deterrent threats far less often when facing potential cyber operations than when facing a potential kinetic attack.