From Xbox to Nintendo, gamepads tend to have a similar set of face buttons. A, B, X, and Y are the choice de rigueur. Early consoles like the Nintendo Entertainment System (NES) used A and B buttons, ...
Prototype controllers can go through dozens of iterations before a final design is decided upon. Here is a look at some of the wackier designs. These are all pretty unknown, so hopefully you find some ...
Sony has filed a patent for a completely touchscreen-based controller, but don't count on it being part of the PlayStation 6 just yet or anything.