Details on the fourth game in Penny Arcade's On the Rain-Slick Precipice of Darkness series were revealed in a recent IGN interview with Zeboyd Games' Robert Boyd and Bill Stiernberg.
For starters, Rain-Slick 4 will be less linear compared to the third game, as Boyd said the team has "added more optional areas" and have "tried to add more secrets and secondary routes to the main dungeons." The overworld will be "freely explorable" as well.
Zeboyd's involvement as developers grew from its experiences with the third game, as Boyd noted they "had a lot more creative control over how the game and the story turned out with this one."
Boyd said the two-man team plans to work on a "sci-fi/spy RPG" that involves a "distant future setting, female protagonist, on-map battles, more animated sprites" and a "cool level-up system" after Rain-Slick 4 is completed. Penny Arcade's On the Rain-Slick Precipice of Darkness 4 will launch this Spring on PC for $4.99 and the Xbox Indie Game channel for 400 MS points.