If you want to do serious gaming on the Apple TV, then using a wireless Bluetooth controller isn’t an option, it’s a necessity. Yes, Apple controversially made it a requirement for all games on its platform to support the Siri Remote, but that’s not going to cut it for any game with an even mildly complex control scheme.
Games like Alto’s Adventure and Mr. Jump play perfectly fine, and are even suited for the Siri Remote, but in most cases, you’re definitely going to want a controller as an option.
Unfortunately, there is no Apple-branded controller to speak of, but Apple did co-design a controller with the help of SteelSeries. The result of that partnership is the SteelSeries Nimbus, and Apple is promoting this controller as the de facto standard alternative input device for the Apple TV.
All of that considered, while there are other 3rd-party Bluetooth controllers that work with the Apple TV, the most obvious choice is the SteelSeries Nimbus.
I purchased a Nimbus on day one, and have been playing with it for weeks. Is the $49.99 controller worth your time and hard-earned money? Is it really the best way to control games on the Apple TV?