Tennis for Two ... the first videogame? Pic: Brookhaven National Laboratory The forerunner of today's video games celebrated its 60th birthday last week as the anniversary of William Higinbotham's Tennis for Two rolled around.Tennis for Two was built by Higinbotham as a way of injecting a bit of life into the somewhat non-interactive nature of US-based Brookhaven National Laboratory's annual exhibition. It consisted of two controllers attached to an analogue computer and an oscilloscope showing two lines representing a tennis court and net, and a bright dot to represent the ball.Each player had a controller with a button to swing...