If you were a kid in the 1980s you remember the movie “WarGames”. Back when 640K was all your would ever need, Matthew Broderick played a high school hacker that accidentally stumbled across a back door into the military’s supercomputer and got it to play a game of nuclear war, a game that the machine was intent on playing in real life soon.

Now a software company called Introversion Software has made “Defcon: Everybody Dies”, a PC game that is available for download via the Steam service for under $20 or a little more on store shelves.

The game looks similar to the NORAD displays from “WarGames” and plays a little like Risk but has a surprising somberness to it that is captivating and chilling. After setting your forces across your home landmass you then begin start moving toward doomsday, deciding whether you should launch a swift surprise attack or try to negotiate an uneasy truce with your opponents.

A demo can be grabbed from the game’s website and if you like it you can purchase the full version from there which unlocks additional game modes and allows for up to six player warfare.