The aliens have come, and they've transformed Earth into a multilevel, video game--like dungeon. It's the newest season of the galaxy's most watched game show, Dungeon Crawler World. Now on the third floor, Carl and Donut have to fight harder than ever. They've already proven that a Coast Guard vet and once-and-forever feline royalty are an almost unstoppable team. Their ratings are off the charts. Viewers can't get enough. But the dungeon gets more dangerous each day, and now there's a whole new problem to deal with: Quests. They call it the Over City. A sprawling, once-thriving metropolis devastated by a mysterious calamity. But these streets are far from abandoned. An undead circus trawls the ruins. Murdered women rain from the sky. An ancient spell is finally ready to reveal its dark purpose. Can Carl and Donut solve the mystery in time? And can Carl finally find some pants?

Carl's Doomsday Scenario was originally self-published, in a different form, in 2021.