Tennis for Two

One of the first Video Games, from 1958. Tennis for Two is a Side View, Player Versus Player, tennis game. Created by physicist William Higinbotham to entertain visitors at Brookhaven National Laboratory in Upton, New York. Based on Brookhaven's military computers, which could calculate ballistics.

This game provides examples of:

 * Player Versus Player
 * Side View
 * Sports Game
 * Ur Example: Depending on how you define a video game, this is either the first or second ever (if the latter, it debuted six years after OXO).
 * Vector Game