Since video games existed theres been the need to make your avatar on the screen actually do things.
At first this was done with simple knobs and joysticks and when video games moved from the arcades to the living room this seemed to be the way things were going to stay... But it wasnt.
And although many controllers share similarities theres one that stands out for a very specific reason and thats Sonys PlayStation controller.
Why do the PlayStation controllers have triangle, circle, X and square?