Hi Joseph, we are working hard to get as many games as possible to support eye tracking in intuitive and well designed ways. Most of the time this necessitates a harmony of control with the other control devices that usually does more than depend on simple gaze location as a sort of mouse emulator. Games work best with our trackers when eye tracking is a vital component of the experience as opposed to a replacement of an existing input device.
That being said, there are a number of 3rd party projects (such as Project IRIS) available to you to try with try to allow simple eye tracking, however this is not software we would support.
Please keep checking back with us for updates as we continuously aim to expand the games using Tobii Eye Trackers!