The Blister Critters Rulebook contains 96 pages of mayhem: 6 Critter categories consisting of 66 different animals; 4 Blister Paths full of dozens of mutant powers and cartoon-logic Nonsense powers; 10 cartoon Roles to play in your party; mind-blowing full-color art by Anthony Grasso (Odd Gob Games); a unique day/night cycle that reflects the fluctuating dangers of the eco-apocalyptic Critterverse; a new take on the Grit System, originally built to power the sci-fi game Stillfleet; light narrative rules for Catchphrases, Ad-Libs, and other cartoon-show fun-all new to the Grit System; hundreds of examples of Stuff and how a creative Critter might employ it; intuitive moves for the Producer (the GM); and a full starter episode, The Gems of Blisterbeak.

Written, illustrated, and designed by Anthony Grasso with rules co-developed with Wythe Marschall (creator of the Grit System).