I have an Xbox 360 controller connected and noticed the game has built-in compatibility for it. However, there is no way to invert the look/aim controls. There is an option to invert the mouse and it works just fine. But it doesn't have any affect on the controller. As of now, there is no way to invert the controller's look/aim for people who are used to those type of controls and don't want to have to use the mouse/keyboard.