Wizard of Wor was the first thing I thought of, but then I went and looked at a few things. Encryptor may be counting the blade that pushes the other two together as a "third leaf". Wizard of Wor sticks have four blades on their leafswitches. Further, I just looked at the bottom of a couple of Xenophobe joysticks, and for no reason I can think of, there is indeed an extra wire soldered on to one tab on each switch, so that each switch in fact has three wires.
Pics coming.