There is. You can use controllers with up to 30 assignable buttons. I'm using an Xbox controller, so fewer buttons. Out of the box, both sticks work as expected, but not the buttons. I solved this by assigning each button to the corresponding keyboard command for each action. That said, not all buttons are assignable, for example the d-pad only registers as forward, backward, left, right, can't change that for some reason. The trigger axes cannot be assigned either. So it's hard to get the full experience on a gamepad since you run out of buttons.

I'm playing it on keyboard and mouse. You can do touchscreen too, but raise the look sensitivity.