A dungeon crawler is web fiction in which the protagonist goes down into a dungeon and fights their way through it floor by floor, with each descending level raising the danger, the rewards, and the character's power in step. It sits inside LitRPG and progression fantasy, and its defining engine is the descent itself: the dungeon is a legible ladder of escalating floors that converts danger into growth. Matt Dinniman's Dungeon Crawler Carl, which began as a self-published web serial in 2020, is the book most English readers point to as the modern anchor of the genre.
What is a dungeon crawler, exactly?
A dungeon crawler is a story whose central structure is the descent, where a protagonist enters a dungeon and works their way through it level by level, each floor deadlier and more rewarding than the one above it, until the depth of the dive and the strength of the character have climbed together. The dungeon is not scenery in these books, it is the plot's skeleton, a stack of discrete challenges arranged from survivable to lethal that gives the author a ready-made escalation curve and gives the reader a map they can hold in their head. This is one of the load-bearing subgenres in the family laid out in our web fiction genres explainer, and it almost always wears the LitRPG apparatus, so you see the levels gained, the new skills, and the loot pulled off a boss printed right there on the page. My feeling about dungeon crawlers, having read a great many of them, is that they endure because the form does something most fiction has to work hard for: it makes progress visible. Every floor cleared is a concrete unit of advancement the reader can feel, and the genre is essentially a machine for delivering that feeling on a reliable schedule.
The name is borrowed straight from games, and the debt matters. In tabletop Dungeons and Dragons, which arrived in 1974, a dungeon crawl is a session spent moving room by room through an underground complex, fighting what lives there and taking what it guards, and the dungeon crawler video game grew out of the same impulse, from Rogue in 1980 through Wizardry and on to modern descendants. Web fiction inherited both the structure and the pleasures: the resource management, the risk of pushing one floor too far, the satisfaction of a hard-won level. So a dungeon crawler novel is, at heart, the prose version of an activity readers already understood before they opened the book, which is a large part of why the genre found an audience so fast.
Where did the dungeon crawler genre come from?
The modern web fiction dungeon crawler crystallized around 2020, when Matt Dinniman began serializing Dungeon Crawler Carl and gave the category a runaway hit everyone could name. Its premise is a clean, brutal escalation of the form: alien forces convert the Earth into a multi-floor dungeon, broadcast the resulting slaughter as an intergalactic game show, and Carl, along with his ex-girlfriend's cat, has to descend and survive one increasingly lethal floor at a time while a system interface narrates his levels, classes, and loot. The book started as a self-published serial and grew into one of the defining LitRPG works of the decade, later reprinted by Ace, an imprint of Penguin Random House, as of this writing, which is about as mainstream as this corner of web fiction has reached. What Dungeon Crawler Carl proved is that the descent structure could carry not just tactics and numbers but genuine grief, comedy, and social satire, and a lot of what has been written since is in conversation with it.
But the roots run deeper and further out than any one book. The Korean web novel wave sent its own version of the shape into the world with hunter-and-gate stories, where dungeons or gates open onto reality and licensed hunters descend to clear them, and Solo Leveling by Chugong, serialized in the late 2010s, is the towering example, a story whose protagonist grows from the weakest hunter alive by surviving dungeons that should have killed him. On Royal Road, the pure delving strain has its own standard-bearers, and Delve by SenescentSoul is one readers point to often, a serial so committed to the mechanical honesty of its dungeon that its skill and experience math became part of its reputation. I think the genre's strength is precisely this range, that the same descending-floors chassis can hold a lethal game show, a national hunter bureaucracy, and a quiet, numbers-forward solo delve, and that all three are recognizably dungeon crawlers.
What makes a dungeon crawler work?
A dungeon crawler works when each floor is genuinely its own place and the descent genuinely costs something, because the failure mode of the genre is a staircase of identical fights with bigger numbers taped on. The strong examples treat every level as a fresh design problem, so one floor is a flooded labyrinth, the next is a social trap where the monsters bargain instead of charge, the one below that changes the rules of the system itself, and the reader never quite knows what the next descent will demand. Escalation is not the same as repetition, and the difference is almost always variety of kind rather than degree. Dungeon Crawler Carl is relentless about this, giving whole floors their own theme, economy, and cast, and that refusal to reuse the same encounter is a large part of why the crawl stays gripping hundreds of thousands of words in.
The other thing that separates a good crawl from a grind is friction, the sense that going down is expensive. A protagonist who strolls through every floor at full health with a full inventory has no story, only a highlight reel, so the durable dungeon crawlers make the descent bleed resources, inflict injuries that linger, and force real trade-offs about when to push and when to retreat and heal. Progression should feel earned against a floor that pushed back, and the clearest way to lose a reader is to let the numbers rise faster than the danger, so that by floor forty nothing can plausibly threaten the hero. My advice, then, for anyone writing one, is to design the dungeon before the character's build, because the floors are the story and the build is only how the character answers them. A crawl also needs a reason the protagonist cannot simply walk out, whether that is a sealed entrance, a countdown, a debt, or a world that has already ended above them, since a dungeon you can leave whenever you like drains the tension out of every descent.
There is a bookkeeping problem hiding under all of this, and the long crawls feel it worst. By the time a serial is a hundred chapters deep the author is tracking floors and their rules, boss mechanics, an inventory of named loot, a party of recurring characters, and a system whose exact behavior readers will hold you to, and the fastest way to break a dungeon crawler is to let a skill work one way in chapter ten and another in chapter ninety. This is the part I watch authors wrestle with most, and it is why the tools on IlorisNovel put a wiki, an @mention system, and a timeline next to the editor, so a floor's rules and a piece of loot's exact effect stay findable three hundred chapters later instead of buried in a scratch file. Whatever you use to keep it straight, write the system's rules down before you lean on them, because a dungeon crawler lives or dies on whether readers trust that the numbers are real.
Dungeon crawler, dungeon core, and the neighbors
A dungeon crawler is defined by which side of the dungeon door the protagonist stands on, and the cleanest way to see that is to set it beside its mirror image. In a dungeon crawler the hero descends into the dungeon to clear it, and the reader is on the adventurer's side of the fight; in a dungeon core story the dungeon itself is the protagonist, a sentient core that builds the floors and breeds the monsters meant to stop exactly the kind of intruder a crawler follows. Same underground, opposite camera, opposite loyalties, which is why the two subgenres read as reflections and why an author who has written one often understands the other by inversion. The pair is worth knowing before you tag your own work, because readers who came for a crawl will be annoyed to find themselves rooting for the trap, and vice versa.
The crawl also overlaps heavily with several neighbors, and most dungeon crawlers are more than one thing at once. It sits squarely inside LitRPG, since the floor-by-floor structure and the visible system almost always travel together, and you can read our explainer on what LitRPG is for the wider mechanical family. It crosses constantly with system apocalypse, because the neatest way to trap a modern person in a lethal dungeon is to have the system arrive and turn the world itself into one, which is essentially the Dungeon Crawler Carl setup. And it shades into progression fantasy generally, since the descent is a progression track by another name. None of these labels are exclusive, and a story can be a dungeon crawler, a system apocalypse, and a LitRPG in the same breath without any of the three canceling the others out.
Dungeon crawlers are one of the healthiest corners of web fiction right now, and I think they stay that way because the descent is a structure that never stops generating stakes as long as there is a floor below. If you are drawn to write one, the on-ramp is simple enough: read Dungeon Crawler Carl to see how much the form can carry, read a mechanically honest serial like Delve to see how the middle game actually plays out floor by floor, and then design your first ten floors as ten distinct problems before you write a word of your protagonist going down the stairs. The floors are the story. Everything else is how your character survives them.
Common questions about dungeon crawlers
What is a dungeon crawler in fiction?
A dungeon crawler is a story in which the protagonist repeatedly enters a dungeon and works downward through it, clearing rooms and floors that get more dangerous the deeper they go. It usually carries LitRPG machinery, so the reader sees levels, loot, and skills gained on the page, and the descent doubles as the progression track. The genre takes its name from tabletop and video game dungeon crawling, where the whole point of play is going into the dungeon to fight, loot, and survive.
What is the difference between a dungeon crawler and a dungeon core story?
The difference is which side of the door the protagonist stands on. A dungeon crawler follows the adventurer who descends into the dungeon to clear it, so the reader roots for the person going down. A dungeon core story is told from the dungeon's own point of view, where the sentient core builds the floors and breeds the monsters meant to stop intruders. Same setting, opposite camera, opposite loyalties, which is why the two subgenres are often read as mirror images.
Is Dungeon Crawler Carl a LitRPG?
Yes, Dungeon Crawler Carl is a LitRPG, and one of the best known in English. Matt Dinniman's series puts the full apparatus on the page, with levels, classes, loot boxes, and a running system interface, all wrapped in a lethal dungeon that has consumed the Earth and turned its clearing into a broadcast game show. It began as a self-published web serial in 2020 and became a genre-defining hit, later picked up in print by Ace, an imprint of Penguin Random House, as of this writing.
What makes a good dungeon crawler story?
A good dungeon crawler makes each floor feel distinct and makes the descent cost something. The strongest examples give every level its own rules, hazards, and inhabitants so the reader is not just watching the same fight at higher numbers, and they force the protagonist to spend resources, take injuries, and make trade-offs on the way down. Clear stakes, a legible power curve, and a reason the character cannot simply leave are what separate a gripping crawl from a numbers-go-up grind.
Are Solo Leveling and gate stories dungeon crawlers?
They are close cousins, and many readers file them together. Solo Leveling and the wider hunter-and-gate genre send their protagonists into dungeons or gates that must be cleared floor by floor, which is the core dungeon crawler shape, though gate stories often spend as much time on the modern world outside the dungeon as inside it. The label is loose, and a story can be a dungeon crawler, a system apocalypse, and a LitRPG at once without contradiction.
by Jacob Tam · August 13, 2026
I run IlorisNovel, a platform for web fiction writers. If you want to see what building a dungeon here feels like, you can try the editor with no account.