“Nuclear War Simulator,” a new simulation game, is an educational piece of software designed to draw its users into reflecting on the humanitarian effects of nuclear wars, including conflict with North Korea.

Nuclear weapons are thought of as tools of deterrence, but their use — while avoided in war since Aug. 1945 — remains a possibility. “Nuclear War Simulator invites its users to reflect on the conditions and consequences of use.

Though available on Valve’s Steam store for video games, “Nuclear War Simulator” is not a game in the traditional sense: There are no levels, no high scores and no