Never mind gaming – with some slight modifications (like some thumb buttons), two of these mirrored could make a very nice work keyboard, with the joysticks replacing the mouse + two scroll wheels.

The design is based upon keyboard like that.

See the Dactyl and Dactyl Manuform.

Adding the joysticks shouldn't be as difficult as designing the whole thing from scratch.

https://github.com/adereth/dactyl-keyboard

https://github.com/abstracthat/dactyl-manuform