Microsoft has released a set of Windows drivers for the Xbox One controller making it possible to use the controller on any game that features gamepad support for the Xbox 360 controller. Microsoft is planning to distribute the drivers through a Windows update but you can download them now using these links over at MajorNelson.com.
You also might be interested in taking a look at the ControllerMAX CronusMAX, an accessory that lets you use nearly any controller with nearly any PC or game system.