For eons, conquering dungeons has been the most efficient way to become a strong adventurer. Although not everything is as straightforward as it seems. Several questions have always plagued the minds of those who enter these mythical places of power: why are there so many monsters? Where do the amazing weaponry and heavy gold coins come from? Why does the very air fill with life-giving energies? Cal has all of the answers to these age-old questions, for a very simple reason. He is a Dungeon Heart.

In the distant past, a time of magic and swordplay, there lived Harold, the mightiest lich of all, a master of arcane sciences, and a challenger of gods. After reaching the pinnacle of his power and finding it surprisingly bland, Harold waged a cataclysmic war against the gods, aiming to shatter the very system that confined him.

A world on the precipice of the apocalypse. A secret forged in the flames of war. A chance to start over. For John Sutton, only one of those three things matters. Retired from a decade of brutal war, he wants nothing more than a quiet pastoral life while he does his best to stem the steady increase of his Doom Points before they hit 100, signaling the start of the end. He’s been given a small farm on the outskirts of the empire as thanks for his service, but no matter how far he travels, it's impossible to escape the war's devastating effects on the world.

Lily Red, known as "Little Red", has trained her entire life to become a system-acknowledged scout under her Grandmother's guidance. Hunting, tracking, and trap-making—she's a master of her craft. But her dreams of joining the elite Scout forces are repeatedly blocked by a leader of the Wyld with a grudge against Grandmother. When Lily uncovers an impending invasion by Wolf Warband, brutal raiders from the frozen north, a deadly challenge offered by their war leader sets her pulse racing.

After his town is put to the sword and the children are taken to replace the fallen, an old man is out for revenge. He’s ready to fail at the most difficult challenge in the world: cultivation. Too corrupted to even take the first steps, the sly old elder simply agreed with those who told him that it was impossible. Then he quietly ignored them, rubbed his hands together, and started anyway.

Nathaniel's bus ride was supposed to be just another boring commute. Wrong. Now, he, 23 fellow passengers, and a corgi named Biscuit, are stuck in a "Hell Difficulty" Tutorial, battling monsters and leveling up to survive. Easy difficulty, anyone can handle. Normal difficulty, you've got to put up a fight to get by. Hard difficulty is where only the tough ones last. And Hell? That's where you have to be a bit out of your mind! With his terrifying talent for mana manipulation, Nathaniel decides to invest every stat point into mana.

A visit to London’s Natural History Museum became a horror show as magic flooded Earth. Now, Thomas is entombed there as a Dungeon Core, with only the creatures on display available as minions. All over the globe, patches of land have been replaced by strange alien environments, containing not only monsters from myth and legend, but also humanity’s worst nightmares. Leviathans stir at the bottom of the ocean, dragons have reclaimed the skies, and shadows are once again something to fear.

Against his will, Thaden was transported elsewhere in a big flash of light along with millions of other Humans from Earth, to a place where they would train to become Contenders in a whole new world. Unfortunately for him, something occurred during his transference into the “Training” program, and he was ejected from the whole training process and sent into the open mouth of an active volcano for bodily disposal.

Caim makes his living on the edge of a blade, but when a routine job goes south, he is thrust into the middle of an insidious plot. Pitted against crooked lawmen, rival killers, and sorcery from the Other Side, his only allies are Josephine, the socialite daughter of his last victim, and Kit, a guardian spirit no one else can see. But in this fight for his life, Caim only trusts his knives and his instincts, but they won't be enough when his quest for justice leads him from Othir's hazardous back alleys to its shining corridors of power.

When a God of War barged into his apartment, Jake had no idea what to expect... but it wasn't being forced into a never-ending war against evil invaders, or that the battle would strangely resemble the MMORPG games he loved. Working hard and building himself up from almost nothing, Jake would need every bit of knowledge and preparation to master his new class of Summoner. Joined by a sly Demoness with an ancient past and a shy Valkyrie hoping to prove herself in battle, they'll find excitement and enjoyment as they level and grow in power.

Beneath the light of three moons, the world of Aster Fall lies shattered. Classes are broken, Outsiders are invading, and the future is unknown. The ancient guardians have left and no one knows where they have gone. The fate of the world lies with one young man. Sam Hastern. His family has been cursed by a broken class for the last fifty years. No one has ever managed to level it, condemning them to the lowest paying jobs and life in a barren village.

Oren, a high-level guild master, wakes in the body of a lowly goblin. Cast out, betrayed by his most trusted advisors, Oren is stuck in New Era Online. However, there are advantages to being on the monsters’ side. Starting from scratch, he’ll have to build up a powerful monster clan to take revenge. But first, he'll have to survive long enough not to be someone else's fodder.

Eli "Nacho" Naches is a fearsome assassin who has lost everything in a post-apocalyptic world full of monstrous creatures. He knows where he fits in this horror show, and he’s only been hanging around to see what’s going to be thrown at him next. When he’s finally put in chains and sent to the chopping block, he goes readily...only to be unexpectedly sent back in time to his younger body with his memories intact and the chance to make a difference.

Ascending should have been the easy part. But after being thrown into the void, Thorn finds himself stranded in a strange world filled with even stranger creatures. Together with his cute battle pet, the mysterious god beast Hati, and a sentient AI named Eve, Thorn must forge a place for himself in this new world. Unfortunately, the local guilds all have other ideas, and soon the Titan finds himself embroiled in plots that even his famed strength cannot help him with.

Silas is inducted into the System, becoming the last in a long line of Earth's "forerunners." The rewards are great, but the danger is greater. We are not alone in the universe. The fate of five worlds hangs on how their forerunners perform. Will Silas have what it takes to win Earth a place in the multiverse? Or will Earth become another mining world stripped of all resources and left a barren husk floating in the cosmos?