A joystick and a button were plenty for most consoles ... You've probably seen this before. It's a PlayStation 4 controller. This layout is almost identical to the original DualShock controller ...

one of the market leaders in high-end custom controllers, start at $140. playstation 4 dualshock 4 back button attachment Credit: adam rosenberg / mashable playstation 4 dualshock 4 back button ...