I previously reviewed the Apple TV gen 4 and one of my complaints was that the new remote control wasn't great for playing games. I'm happy to report that the SteelSeries Nimbus wireless gaming controller solve this issue. Sold at Apple stores and online, the Nimbus can be used with iPhone, iPad, Apple TV and Mac and easily connects via Bluetooth. The controller includes a built-in rechargeable battery and is easily recharged via an Apple Lightning cable. The controller is well-made, comfortable, responsive and comparable to other game controllers like XBox and PS4. At $49.95, the Nimbus $10 less than those controllers.
A brief demo of using the controller with an iPad to play Pinball Arcade: