Carl’s Doomsday Scenario: Summary and Review

Carl’s Doomsday Scenario is the second book of the Dungeon Crawler series by Matt Dinniman. In the second installment of the series, Carl and Donut find themselves on the third floor, where the training levels are over and the real “fun” begins in this season of the dungeon crawler world. On this floor, the plot thickens, dangerous and unhinged quests are everywhere, and the stakes for survival are higher than ever. There is an undead circus, a mysterious calamity to unravel, and Carl still doesn’t have any pants.

I probably don’t even have to sell you on this if you finished Dungeon Crawler Carl, but Carl’s Doomsday Scenario turns an already fun experience into a spectacular one. The world expands quickly, character development kicks into turbo speed, and we get to know not just the crawlers from Earth, but also the dungeon staff and NPCs, all while having a genuinely great time (this post is not sponsored by the Syndicate, I promise). The series remains well thought out, wonderfully weird, and continues to set the standard for future LitRPG reads.

Read our full summary and review of Carl’s Doomsday Scenario below. This post contains spoilers.

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Tropes

• LitRPG
• Found Family
• Adventure
• Humor

Review

Overall Impressions 😊

I loved it. Dungeon Crawler Carl left some really big shoes to fill. It was such a novel idea that I genuinely wondered if the series could maintain the high standard it set for itself in the first book. Carl’s Doomsday Scenario didn’t just meet my expectations, it exceeded them completely. In fact, it blew them out of the water.

I honestly expected that at some point the series might start to feel repetitive or lose its freshness, but that never happened here. Between the character development, the new characters we get to meet, and the increasingly unhinged quests, it’s clear this is a massive world planned out in excruciating detail. The balance of the magic system, the structure of the dungeon, and the long term storytelling all work together instead of fighting each other.

It was a captivating read from start to finish. Yes, there are certain arcs that run a little long, but it’s obvious they’re setting up future books and floors. You end up filing away every piece of information Matt Dinniman includes because you can feel it. There is a plan.

Add on top of that the superior audiobook experience, and this ends up being nothing short of a fantastic read.

Perfect For Fans Of… 🧭

This was my first ever LitRPG experience, so I don’t have much to compare it to, but honestly, I don’t understand how anything could top this. This feels like the peak LitRPG experience.

If you’re someone who enjoys high fantasy or series with complex magic systems but worries about getting bored or overwhelmed by the mechanics, this is a fantastic entry point. The systems are detailed, but they’re explained in a way that keeps you fully engaged rather than confused. The pacing never lets your attention drift, and the worldbuilding unfolds naturally as you go.

You’ll feel charged, excited, and ready to go the entire time.

And if you’re a gamer, this is an absolute must read. The game system is phenomenal. I genuinely can’t believe this isn’t a real game yet, because I would play the hell out of it.

Also, not to mention, this is peak audiobook material. I always thought Project Hail Mary was the gold standard for audiobook narration, and this book gives it some very stiff competition.

Characters 👥

The way this series handles character development really sings to me. The first book was all about establishing the stakes and introducing us to the world, so we mostly got Carl, a cynical human with a strong penchant for chaos, and Donut, a former regular cat who is now super intelligent.

First of all, I love Carl. He’s an agent of chaos with a deeply sarcastic point of view, which makes him completely my kind of guy. This book does something especially interesting by slowly drip feeding bits and pieces of Carl’s history with his mom and dad. Those small reveals add a surprising amount of emotional depth and help us better understand his motivations.

Princess Donut is just as charming as ever. She’s basically a toddler, which means she gains more personality as she learns about the world around her. That choice is genuinely genius, because we’re learning about the dungeon at the same pace she is, so her reactions always make sense to us instead of feeling over the top.

This book also gives us more of Mordecai and Odette, who feel like fully realized supporting characters with histories of their own. Katia is eventually added to the mix, and I’m really looking forward to seeing more of her in future books. It truly feels like a found family forming right in front of my eyes, and I’m hoping we continue to meet more humans and NPCs to build out the squad even further.

Plot 🗺️

It goes without saying that I’m a pretty cynical reader who churns through a lot of books, so I was genuinely worried we were going to spend another installment just watching Carl and Donut grind. I shouldn’t have worried, because what we get instead is so much better.

The pacing is fast, and there’s always something happening. It genuinely feels like you’re playing the game right alongside them the entire time, which means there’s no room to be bored.

The quests are genuinely amazing. They layer into the world so well that we’re learning about the characters, the current “season” of the dungeon crawler world, and the larger universe all at the same time. We’re also being drip fed the real conflict happening behind the scenes between the Borant Company and the Syndicate, and Matt Dinniman’s meta lore game here is incredibly strong.

The world already feels massive. You can clearly see deeper areas being set up, like the Hunting Grounds, the Sultanate wars, the gods, Carl’s Doomsday Scenario, Maggie’s potion, and so many other threads that haven’t fully paid off yet. I have complete faith that Matt Dinniman will tie all of this together, which is honestly hard trust to earn from me as a reader.

Some of the quests definitely run long. I did feel like we spent a little too much time in the circus, but once you step back and look at how much groundwork is being laid for future floors, especially the sixth floor, it becomes worth it. I’m fully on board for what’s coming next.

I’m also dying to find out what’s happening outside of the literal game show, particularly with the Syndicate and the Borant Company. That external conflict feels just as compelling as the dungeon itself.

I love deep worldbuilding that keeps me on my toes, and I love authors who make me stop and think, “wow, he thinks of some weird stuff.” This book delivers on both fronts.

My Favorite Quote 📣

“So help me god,” I said. “I will abandon you right here and right now if you choose to take up the kazoo.”

Matt Dinniman, Carl’s Doomsday Scenario

Writing Style and Narration ✍️

Matt Dinniman’s writing style is chaotic, fun, and sarcastic as hell, which is the fastest way to win me over as a reader, and somehow it still manages to make you think. Because don’t get me wrong, this book is absolutely trying to say something, and I love that about it. Carl’s voice is incredibly relatable. His sarcasm oozes off the page, and the absurdity of real humans trapped inside a real video game, paired with genuinely sharp dialogue, is such a treat to read.

The pop culture references are also perfectly placed. I genuinely cried laughing at “Brad the Chad 69” for a solid five minutes, and moments like that never feel forced or outdated.

And as if the writing itself wasn’t already strong enough, this book is meant to be consumed in audiobook format. It’s an Audible credit investment, or a local library borrow, that honestly feels underpriced for how much work goes into it. The performance Jeff Hays delivers here is unreal. The voices, the timing, the emotional beats, the sheer commitment to the bit, all of it elevates the story to another level.

Synopsis

End of Training Levels and Class Selection

Carl and Donut find themselves on the third floor, where the training levels have officially concluded. They return to the training guild, where their game guide Mordecai is waiting for them so they can make their class selections. For the second floor, Mordecai has taken the form of an incubus, a handsome hell demon with wings.

They are both presented with a plethora of class options, with the system AI suggesting a top three for each of them based on their aptitudes.

Donut goes first, making a dramatic show of debating her options. She is adamant about keeping her race as a cat. After pretending she is going to choose a different class, Donut ultimately selects the Former Child Actor class. It is revealed that the secret advice Odette gave them at the end of book one was to choose a class with a manager benefit. Because of this, Mordecai becomes Donut’s manager, allowing him to travel with them to safe rooms and guide them through the game with his expansive knowledge.

Mordecai is furious about this outcome, and Carl and Donut agree not to tell him that this was a deliberate choice.

Carl then makes his selection, changing his race to a Primal, an empty canvas that scales dramatically as he levels up. He chooses the Compensated Anarchist class, which gives him improved handling of grenades and explosives.

Mordecai explains how the Over City works and introduces several overarching storylines, including the Scolopendra Volcano. He also mentions the Hunting Grounds on the sixth floor, a more elaborate storyline that ties directly into the larger seasonal narrative. He advises Carl and Donut to head toward a medium settlement, where the shops will be better and they can grind along the way.

Before they leave, Zev reaches out to share audience reactions to Carl and Donut’s class selections.

As they explore this level, Carl and Donut begin receiving quests for the first time. While wandering the Over City, they get their first quest, “The Show Must Go On.” They start encountering lemurs and clowns, hinting at an overarching circus theme.

When they finally arrive at a safe room, Mordecai appears with them, gets drunk, and eventually passes out in his own vomit.

Donut gains a new skill, Clockwork Triplicate, a spell that allows her to multiply Mongo into three copies, including two mechanical versions. They also receive mystery Earth hobby potions. Donut gains the Scutelliphikly skill, which neither she nor Carl understands. She also receives a cat tree and scented candles meant to remind her of home.

Carl receives the Cesta Punta skill, along with a stack of books and a plant.

Grimaldi’s Traveling Circus Quest

Carl and Donut wander through the Over City and come across a fallen party. Donut loots the body of one of the dead crawlers and finds an anklet belonging to someone named Grace Bautista. Soon after, they encounter Grimaldi’s Traveling Circus, where a battle is being prepared. Caught between two skirmishing NPC factions, Carl and Donut narrowly escape magical mortar fire.

They meet Tsarina Signet, a half Naiad, half Elf Elite, completely naked and covered in tattoos that move across her skin as if they are alive. She is their first encounter with an Elite NPC. Signet charms Carl, leaving him physically affected by the spell.

The circus consists of three massive tents surrounded by wagons. It becomes clear that Signet is attempting to cast a spell. Carl is forced into combat with a Mold Lion, a creature covered in foul decay, and manages to defeat it. Signet’s spell ultimately fails to cast.

They retreat to a safe room, where Mordecai explains that Elites are producer implanted NPCs, placed into the game to drive narrative. Each Elite typically has their own show and storyline for the season. Unlike standard NPCs, Elites are not controlled by the system AI and instead follow a scripted narrative.

While watching the recap show, Carl and Donut see that Hekla has chosen the Amazonian Shieldmaiden class. Lucia Mar becomes a Lajabless, a race that alternates between skeletal and human forms. Depending on the form, she spends half the day with boosted magic and the other half with doubled strength. Lucia selects the Black Inquisitor General class, a hybrid of cleric, magic user, and warrior.

Brandon, one of the caregivers from the Meadowlark retirement community, reaches out to update Carl on how everyone there is doing.

Carl and Donut attempt to disengage from the circus quest, something Mordecai repeatedly urges them to do. However, Signet casts the Water Lily spell on them, knocking them both unconscious. When Carl eventually wakes up, Signet makes him an offer. If he kills Heather, the Mold Bear of the circus, as her sacrifice, she will allow Mongo to go free. Unable to consider losing Donut, Carl reluctantly agrees. Mongo is left to guard Donut, and Mordecai warns Carl that he can monitor Donut’s health if it drops below a certain threshold.

Carl confronts Heather, a haunted bear whose body is infested with parasites. He realizes that Heather deserves mercy rather than continued suffering. Using the Fireball of Custard spell, Carl burns away the parasites and then puts Heather out of her misery, allowing Signet to successfully cast her spell. Through her tattoos, Signet summons ink elementals.

Carl realizes once again that success in the season is not just about surviving the crawl, but about putting on a compelling show for the universe. Signet asks Zev to discuss Carl’s continued involvement with the show she appears on, Vengeance of the Daughter.

Carl and Signet enter the main tent and encounter Ringmaster Grimaldi, the Pestiferous Fae. Carl puts into motion a plan he and Mordecai have devised. He intends to poison his own blood and feed it to the vine creature in order to kill Grimaldi.

The showrunners respond and agree to Carl’s deal. Carl will appear on the sixth floor show in exchange for preferential treatment on the current floor. Carl poisons himself and casts the Wisp Armor spell to protect against mind control. After infecting himself with a parasite taken from circus food, Carl is able to communicate directly with Grimaldi.

He convinces Grimaldi to lift Signet’s banishment so she can move on, and Grimaldi agrees.

After completing the quest, Carl returns to Donut, who has activated her Cockroach skill, an ability that allows her to survive a fatal blow. Mongo is battered and bloodied from trying to protect her. Despite the damage, all three survive and manage to make their way back to the safe room.

The Featherfell Quest

They return to the safe room to open their quest boxes. Donut gains the Acute Ears skill, and Mongo receives new fang caps. Carl gets new gear along with an upgrade to his boxers. They also hit one quadrillion viewers, earning the achievement tied to that milestone, which unlocks the ability to receive Fan Boxes.

They meet an NPC named GumGun, who attempts to give them a quest involving missing women of the night. Mordecai refuses to let them pick it up. Instead, they purchase a carrier for Mongo and continue grinding to gain levels.

They enter the Desperado Club for the first time, where Mordecai buys supplies for potion crafting. While there, they learn that Lucia Marr started a brawl in the club the night before and has since been banned from entering again.

On their way back, they discover GumGun’s body. Donut insists that they should keep investigating the quest anyway. As they dig further, the clues begin pointing toward Featherfell, the town’s magistrate, as being responsible for the missing women.

They open their Fan Boxes. Donut receives a photo of Beatrice, Carl’s cheating ex girlfriend, pictured with Brad, the man she went on the cruise with. Carl receives an xistera, a banana shaped ball thrower.

Continuing the investigation, they meet Miss Quill, Featherfell’s secretary. Carl taunts her by dropping a body on her desk as “evidence,” but the encounter leads nowhere productive. They learn that the boss was killed by Daniel Bautista, and Carl and Donut are forced to fight their way out.

Carl and Donut later appear on a show called Danger Zone, a panel style broadcast hosted by Ripper Wonton. The panel includes Evo, the program director for the show, Princess D’Nadia of the Prism Kingdom, Manasa, a famous Naga singer, Butler, a middle aged human, Hekla, leader of the Daughters, and Ripper himself as host.

During the show, Hekla asks Carl and Donut to help level up one of her party members who is nearby, and they agree. Carl deliberately provokes the Skull Empire into attacking the show. Manasa is killed accidentally in the chaos. In retaliation, the Valtay destroy Prince Stalwart’s ship, killing his mosher and the Maestro.

Carl and Donut end the sequence by fighting a group of dwarves and mages.

Carl’s Doomsday Scenario Ending Explained

Hekla’s party member Katia Grimm, a doppelganger from Iceland, joins Carl and Donut’s party. She is severely under leveled, but both Carl and Princess Donut commit to helping her catch up. During the recap episode, Lucia places a mark on Carl and Donut’s backs, signaling future consequences.

After the show, Carl, Donut, and Katia head to the magistrate’s building. Carl detonates the hobgoblin dynamite they previously hid inside Miss Quill’s shelves of dolls. Miss Quill is killed in the explosion.

Carl is declared the new Magistrate, effectively becoming the ruler of the town. While investigating further, they discover that Featherfell has been dead the entire time, and that Miss Quill had been secretly running the town. They uncover Featherfell’s remains along with a nest of Krasue, floating monsters made up of severed heads and trailing hair. They destroy the nest and identify one of the victims, Burgundy. They also learn about Remex, Miss Quill’s undead husband, whose existence must be ended to stop everything.

Carl acquires a valuable figure sealed inside a glass cage named Kimaris. They later meet Daniel Bautista, a Tigran Swashbuckler, who thanks them. The anklet Donut looted earlier belonged to his sister. Carl and Donut then confront Remex, initially believing him to be both a Lich and the borough boss.

Remex is revealed to not be a Lich at all. Instead, he is a Soul Leech Capacitor. After his death, Miss Quill summoned him and used his soul energy to siphon power from the town’s soul crystal, an extremely volatile substance. Her goal was to trigger a catastrophic event that could start a war.

Although they complete the original quest, a new one immediately begins. “Fools Who Broke the Glass” is a group quest. Unless all crawlers reach safety within seven minutes of Remex’s death, they will die in the resulting blast radius.

Instead of fleeing, Carl makes a critical decision. He places the soul gem into the glass case he looted earlier. The system AI officially names the device “Carl’s Doomsday Scenario.” Remex begins convulsing as the sequence activates. A magical shock forces everyone to remove all magical gear, including most of their clothing. The second blast triggers all weapons, killing numerous crawlers. The third blast destroys the Sepsis Crown, a temporary item that would have made Princess Donut part of the sultanate wars on the ninth floor. The final blast activates all hot list items.

Before leaving the third floor, Katia detonates the Swordsmen Depot.

Two and a half days later, it is revealed that the depot explosion successfully interrupted the final blast, saving everyone within the radius. Because so many crawlers survived such a high stakes group quest, 83 celestial boxes are scheduled to be distributed. Borant uses their season veto to block the reward, unwilling to grant such powerful loot to so many participants. However, a crawler named Quan Ch manages to open his box anyway and receives extremely high stat gear.

The leaderboard unofficially opens, with Carl and Donut ranking among the top crawlers. Before the book ends, Odette warns them about the god Grull, urges them to be cautious of Hekla, and reminds them that there is now an active bounty on their heads.

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It’s a tough act to follow a six star first book, but Matt Dinniman somehow pulls it off again. Carl’s Doomsday Scenario proves this series wasn’t a one hit wonder and that the Dungeon Crawler Carl universe only gets bigger, bolder, and more unhinged as it goes. We went into this series unsure if we wanted to commit to a seven plus book ride, and now we’re not nervous at all. We’re fully, unreasonably excited 🤯🔥

As of now, we’re already deep into the fourth book, so stay tuned for our upcoming review of the third installment, The Dungeon Anarchist’s Cookbook 📚💥

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We post all of our new reviews, reading updates, and other bookish chaos over there ✨📖 If Instagram isn’t your thing, you can also sign up for our newsletter to stay up to date on new posts and bookish news without missing a thing 💌