https://www.polygon.com/2018/9/25/17903996/telltale-the-walking-dead-final-season-sales-canceled

The Walking Dead: The Final Season is no longer available to purchase on digital storefronts like Steam, the PlayStation Store and GOG.com. Despite the second episode of a planned quartet launching today, Telltale Games has reportedly asked retailers to keep customers from purchasing the full season pass, in light of its uncertain future.

A note on the GOG page for The Final Season says that Telltale specifically requested that the retailer “pause” sales of the game.