Your PlayStation joystick is not recognized in the game? Simply follow these steps:
Open Steam Overlay.
Go to the controller settings.
Select the "Gamepad" layout. Apply the selected layout.
Return to the game and go to its settings. Now your controller should be detected.
All that remains is to adjust the axes and, if necessary, enable control inversion.
In this way, you can set up your PlayStation joystick for gaming via Steam.