Action sets User-configurable action sets are a recently added feature of the Steam Controller. As of this writing, this feature is only available in the Steam beta client.

How to customize the controls on Steam Deck Steam Deck’s controller settings, officially called Steam Input, can be accessed in-game at any time.

How to configure Steam Input for the DualSense Steam added basic support for the DualSense in 2020, and has continually improved the DualSense functionality since then. It's great!

A Steam Deck’s built-in controls may be used with an Xbox controller once they are paired, and since their button layouts are the same, there is essentially no configuration required.

2] Configure Steam Big Picture settings Steam may have trouble recognizing your game controller if you don’t enable the required settings; especially if you’re using a controller other than ...

Using Steam, you can add non-Steam games and use this same process to configure your controller settings. On the other hand, one unfortunate side effect of this method is a broken rumble.

A new video shows exactly how the Steam Controller works with Dark Souls III.