@Crush I haven't tried that.

Awesome, thank you!

Ran the test and determined only the standard 4 buttons are registering. The additional buttons from the 6 button pad do not appear.

I did have this working on previous RetroPies, and also just tested it on my PC and confirmed that all buttons are being registered there. Perhaps I'll reach out to RetroUsb and see if there's a recent compatibility issue.

Appreciate the help.

Maybe you did not install the USB HID quirks for Raspbian? It is a known issue with the older Linux kernels and is described here in the section "Installing USB HID Quirks for the GamepadBlock" at https://blog.petrockblock.com/2017/10/10/tutorial-gamepadblock-raspbian/.

@arj5193 once you get into the game press your hotkey & X at the same time.

@bosco so you have any sonic config files in your genesis/ megadrive roms folder? If so delete them