Spacewar - The first game for computer.

Although there are many other earlier examples of computer games, most consider the 

first true computer game or digital game to be "Spacewar!". This game was programmed 

by Steve Russell and first released in February 1962. The game ran on the DEC PDP-1 

computer, and consisted of two spaceships that maneuvered around a star that pulled at 

the ships with its gravity. The objective of the game was to avoid colliding with the star 

while trying to shoot the other ship with missiles.

The player controlled the game using control switches or a control box. They had the 

ability to rotate the ship clockwise or counterclockwise, provide the ship with thrust, fire 

missiles, and go into hyperspace.