Ever since the birth of the home computer, people have wanted to play games on their PCs.
The patent for the first game using a CRT monitor was filed in 1947.
When the first DEC PDP-1 mainframe was delivered to the Massachusetts Institute of Technology (MIT) in 1961 it took staff just months to write a shooter called Spacewar.
But it was the boom in home-computer ownership in the 1970s that saw games take off. Since then designers have developed code that uses computing power to the fullest and have been pivotal in the development of hardware, such as sound and graphics cards.
Today the industry is worth billions and the population of online gaming communities outnumbers that of some nation states.