Arduino Leonardo/Micro(ATMega32u4) As Gamepad/Game Controller : 8 Steps - Instructables
I made a gaming control panel using an Arduino Leonardo to play simulators. Currently using it for DCS World, but it should work in most games just like any joystick / gamepad.
Arduino HID joystick gamepad na míru!
Arduino Micro/Leonardo USB HID Mouse - Raj Vignesh Navaneetha Krishnan
DIY ARDUINO MOUSE JOYSTICK - YouTube
FAST HID Joystick converter for 2 digital joysticks - Exhibition / Gallery - Arduino Forum
Making an Arduino Human Interface Device (HID) - OKdo
Snes controllers to PC adapter.
Ardunio Micro Joystick Card | The Sim
Using joystick in a game - Programming Questions - Arduino Forum