Worlds first ever computer game

In 1952 A.S. Douglas created a computer version of Tic-Tac-Toe on an EDSAC computer and wasting time had it's foothold.
Spacewar! is generally accepted to be the first true computer game and was written by Steve Russell, a computer programmer from MIT in 1962, strictly for computer play.
If you wanted to play Spacewar! in 1962 you'd need a PDP-1 computer, which was about the size of your family car, and a cathode-ray tube type display and keyboard input.
The goal of the game was to maneuver a spaceship and shoot your opponent before he shot you.