Steam fully supports using gamepads via its Steam Input system. This feature acts as a bridge to ensure your controller works seamlessly with games running on the server.
Plug & Play: For most popular gamepads (Xbox, PlayStation, Switch Pro), detection works automatically once Steam is running.
Customization: If you need to rebind keys or adjust sensitivity, you can do so in Steam Settings > Controller.
Compatibility: Steam Input can automatically convert your specific controller's signal (e.g., PS4/PS5) into standard Xbox input, ensuring compatibility with almost any PC game.
For detailed setup instructions and troubleshooting, please see the official Steam Controller Guide.