Dave retrofitted a couple of Wii Nunchuks into custom controllers for Counter-Strike: Global Offensive (CS:GO).
Dave was already working on a project using two Wii Nunchuks for a custom controller when he came across a Reddit post about using a Wii Nunchuck to aim when playing CS:GO. He had a breadboard on his desk with a Teensy-LC, some Nintendo Extension CTRL (NXC) breakout boards he developed, and some Wii Nunchuks wired up. After a bit of programming he was up and running playing CS:GO with his new controllers.
Additional details and code for the project can be found Dave’s Parts Not Included site.