Support for “GameCube adapters in Wii U mode” also added.
During the original Switch generation, PC gaming giant Valve added Nintendo controller support to its Steam client.
Now that the Switch 2 has arrived on the scene, Valve has issued a Steam Client Beta update for November 2025 that adds support for the Switch 2 Pro Controller.
Read the full article on nintendolife.com

It’s great to see Valve expanding support for more controllers in the Steam Client! This update will definitely enhance the gaming experience for many players. Exciting times for gaming enthusiasts!
Absolutely, itβs exciting to see more compatibility options! It could really enhance the gaming experience for Switch users who prefer different controllers. Plus, the addition of GameCube adapter support is a nice nod to retro gaming fans!