Valve is developing Joy-Con compatibility for Steam

Valve is working on adding Joy-Con controller functionality for the Nintendo Switch to Steam. Joy-Cons will be supported separately or as a matched pair in the latest Steam beta, similar to how they can be used in Switch titles. If you want to test the functionality, you can sign up for the Steam beta – Valve offers detailed instructions on the Steam website — but keep your fingers crossed that your Joy-Cons aren’t drifting.