They are: Former ECW wrestler Ricky Ortiz was a guest hunter on episode three, which aired November 25, 2008.
The Hunters are forced to ignore the camera crews, and are only allowed to break chase when they see a Runner.
10 contestants are released onto a playing field (called a "game board" in the context of the show).
The missions given to contestants at various parts of the game allow the participants to acquire defensive devices to negate the attacks of a hunter(s).
Once the host initiates the mission, the contestants have a certain amount of time to locate the area the item is stationed/hidden, and solve the puzzle in order to unlock/obtain it.