Based on the movie War Games, the game is in three parts
1/ Map screen, of USA, where you need to click on the incoming missiles with the joystick
2/ Zoomed in area of the missiles where you shoot down the missiles
3/ Puzzle screen where you must match a portion of a pattern to a larger screen to crack the code
Any failure of shooting down missiles or puzzle will move the DEFCON (Defense Condition) countdown from 5 to 1. If you reach DEFCON 1, global war breaks out.
The game was reviewed in Compute! Magazine Issue #45, February 1984, Page 134
Requires 8k expansion