Books Like Tunnel Rat: Causing Trouble in Two Worlds

Clay, branded a [Commoner] by the system, steps into monster-filled Dungeons with nothing but his stubborn will to prove that even the weakest class can become unbreakable.

Carl and his foul-mouthed cat fight through a dungeonized Earth, turning alien bloodsport into a rebellion against the system that destroyed it.

Born in the Tower's deadly miasma on the hundredth floor, William Oh wields its corruption like a weapon—but the Tower demands payment.

A street thief must climb a monstrous tower, trading survival for power—one deadly floor at a time.

A human reborn as a monstrous ant larva must evolve and mutate to survive the deadly hierarchy of a dungeon teeming with predators.

A cowardly goblin must conquer his fear of trees and evolve beyond prey instincts to survive the brutal Iron Teeth Mountains.

A fallen soldier reborn as a blighted sapling must reclaim his humanity while his monstrous evolution reshapes the war-torn world around him.

A soulslike master wakes inside his favorite game—as a nameless slave with only fractured memories of past playthroughs to survive its brutal dungeons.

A hellhound pup embraces her monstrous evolution to hunt the humans who slaughtered her pack.

A reincarnated marine biologist evolves from a tiny octopus into a cunning predator, mimicking skills and uncovering a lost System in a magical ocean.

A discarded teddy bear golem levels up to protect his girl in a world where even fluff and stitches can become heroic.

A tutorial NPC trapped in her own dungeon must craft, adapt, and survive as its once-predictable rules twist against her.