Episode three of Telltale's The Walking Dead game series is almost upon us, but if you've yet to get in on the action there's good news — Steam is having a sale. Right now you can pick up a season pass for the episodic series on both Mac and PC for $14.99, or 40 percent off the regular price. The pass gets you access to all five episodes — once they're released, that is — and the deal is only on until August 30th, so act quickly. While the latest episode, "The Long Road Ahead," is launching on the PlayStation Network today, Mac and PC gamers can venture into the zombie-filled world starting tomorrow. And if you're unsure what all the fuss is about, be sure to check out Polygon's reviews of the first two episodes, "A New Day" and "Starved For Help."