Newborn Dungeon Cores must choose what entity they help contain, and that choice determines what monsters they are able to summon. After being executed for crimes forgotten in death, Tira is given the chance to make that choice. Tira chose Acekorah, the Primeval Terror, a being so dangerous few cores will risk trying to contain it.

When Kers is reborn as a dungeon core, he finds himself stuck in the most improbable of places: a cloud. High in the sky and far away from the usual solid resources, Kers must face the obvious question: How is a dungeon to build itself without wood or stone? Luckily, Kers has the sarcastic (and sometimes helpful) fairy Selena to help him get his bearings. Together, the pair delight in exploring Kers’ weird existence, creating novel mobs, and enticing adventures to plumb the lofty heights of his floors.

Elania's life takes an unexpected turn when demon-worshiping cultists summon her to their world, aiming to revive their dead god. When their hated foe strikes, she escapes into Eladu's darkest depths. Amidst savage predators and underground monsters, Elania discovers her newfound abilities are both a formidable ally and a haunting burden that threatens to reshape her very soul. To climb higher towards civilization means she must contend with anti-demon sentiment and those who would use her as a source of arcane power. But Elania is not alone in her struggles.

Ilea likes punching things. And eating. Unfortunately, there aren’t too many career options for hungry brawlers. Instead, the plan is to quit her crappy fast-food job, go to college, and become a fully functioning member of society. Essentially—a fate worse than death.

Ten years ago, Amelia woke up alone and lost in a broken world where she had to fight for her survival. Now, after reaching the pinnacle of power, defeating the Void itself, and escaping the abyss, she has finally found her way back into the real world. But instead of returning to Earth, she arrives in the land of Vacuos. A fantasy world with magic, monsters, Classes, and Levels. A world that is governed by a System like it were a video game.

She's unlike any one or any thing else: a Non-Standard Leashed-Intelligence Cybernetic Enforcer aka NSLICE-00P. The first of her kind, she's let loose into a universe of superheroes on behalf of her sinister masters to destroy all who oppose them. And everything's going according to plan—until NSLICE-00P gets hacked and sent into the past to kill her own creator before he creates her. Obeying orders as always, she wastes the poor guy. Unfortunately, there are consequences to initiating a reality-breaking time paradox. The most significant: total ejection from that reality.

A soul from Earth awakens as Seventh Princess Adelheid of the Vuldar Empire. With a weak body but a monstrous reservoir of mana that threatens her very life, Adelheid engraves an oath into her very soul. She shall seize the throne at all costs, but with ambitious cousins and discontent nobles, her father and brother are far from her only rivals. Experience Adelheid's journey through victory and loss to achieve her deepest desires.

The usual result of a human taking a runaway semitruck head-on is a very sudden, very fast track to the pearly gates. But for one newly noncorporeal man, there's another option: become a dungeon. Feeling sorry for the desperate angel assigned to him, the man relents. Heck, if it doesn't work out, he can always chat with Saint Peter about it later. Next thing you know, he's a dungeon. Admittedly, a small run-down, somewhat unimpressive dungeon (more of a house, actually), but you gotta start somewhere, right?

Betrayed and left for dead by a group of slaving nobles, he thought there was nothing left but to bleed out as he counted the number of bricks on the ceiling. But fate had other plans.

Zaria was just a normal woman, living a simple life—until demons burst through her door and ate her heart. Reborn from tragedy, Zaria rises from the ashes as a Core, but with a twist. A rare mutation has turned her into a Mutant Core, destined to explode unless she forms a bond with a human witch to become a Striga. Her mutation? Legs. With the power of a full dungeon compressed into a walking house that is her body, Zaria sets out on a journey to find her Striga and avoid detonation. Along the way, she battles demons, builds her dungeon, and feeds her mimic mobs.

If waking up in a new world isn't bad enough, Hestia starts her new life as a small, newborn dragon in a hostile forest filled with vicious monsters. With status screens obscuring her vision, her first task is to escape two hungry kobolds wanting some grilled lizard for breakfast. Equipped with fragmented memories from her past life and the gamelike mechanics of her new reality, Hestia must face trials, beasts, bosses, and more as she grows in size and power.

Elaine is ripped from this world to Pallos, a land of unlimited possibilities made real by a grand system governing classes, skills, and magic. Join Elaine as she travels around Pallos, discovering all the wonders and mysteries of the world, trying to find a place where she belongs, hunting those elusive mangos, all while the ominous Dragoneye Moons watch her every move.

She wanted to be a Necromancer, but awakened as a Saint! Somehow her summoned heroes are all undead? How will the church react when their Saintess summons a skeleton in place of a mighty hero? Sofia isn’t too keen on finding out. In this world, Gods choose [Saints], and [Saints] summon [Heroes] from other worlds; everyone knows that. But Sofia had a thing for bones ever since she was a child; there’s only one [Class] she wants: [Necromancer]! When, by the whims of fate, she gets both classes at the same time, the system breaks.

When an ambitious teenage girl from Earth finds herself in a magical realm, she could be the hero—but she'd prefer to be the villain. When power-hungry Everly is reborn into a medieval world where elemental magic rules and she receives her elemental servants—the oddly sadistic Eris and the fun-loving Titania—years earlier than one typically would, she knows she's destined for a command of necromantic magic the likes of which her peers can only dream.

Matt is reincarnated as a Tree. Not just any tree, but an overpowered one in a fantasy world that serves as the battlefield for an ongoing conflict between demons and the heroes summoned to oppose them. But Matt can be a great tool against the evil forces. TreeTree (as Matt comes to be known) will learn all sorts of skills, gain levels, and in doing so, build up a forest, train young subordinates, protect a village, and more.