An interview on IGN follows "The Long, Strange Journey of the Penny Arcade Game," talking with Zeboyd’s Robert Boyd and Bill Stiernberg about Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness, the trilogy that once seemed like it would end after two episodes, and expanding on last summer's revelation that the series is now getting a fourth installment. The new version is coming to Windows and Xbox 360, and they have some screenshots, along with the following explanation:

We are also addressing linearity by providing a freely explorable overworld. Rain-Slick 3 took place entirely in one city, but Rain-Slick 4 takes place in an entirely new world, essentially. That gives us the freedom to really open up the game to a large and varied environment and let players explore. Secondly, I’m building the maps with a more open and interesting structure than I did in Rain-Slick 3. Our original Rain-Slick 3 game design called specifically for somewhat linear maps, and later when we revised the engine I was able to open the maps up a bit more. I don’t want to produce convoluted, confusing maps either; so with Rain-Slick 4, I think I’ve found a good middle ground that allows players to explore a bit without getting confused. Combined with the free, open overworld and optional stuff we’re putting into the game world, I think it’ll feel much less linear.