Despite the previous chapter's appearance on Mac, iOS, and Android, Penny Arcade's On the Rain-Slick Precipice of Darkness 4 will be exclusive to Windows and the Xbox Live Indie Games service, Robert Boyd of developer Zeboyd Games revealed this week.

Boyd cites low interest in Zeboyd's other ported games (including Cthulhu Saves the World) as reason for the PC/XBLIG exclusivity.

"Our mobile games & ports haven't done so well so the new PA RPG will only be on PC & XBLIG," Boyd tweets. "Apologies to fans of iOS/Mac/Android."

He continues: "We'd love to put our games on every platform available but we're a two-man operation and want to be able to keep making new games."

On the Rain-Slick Precipice of Darkness 4 is set to be Zeboyd's most ambitious project to date. Boyd notes that the game in its current state features 50 percent more maps than Rain-Slick 3 and its DLC had, and more will likely be added before it's fully complete.