Hundreds of years ago, the realm walls collapsed, and Earth was flooded with mythical creatures. Now, dungeons dot the landscape, releasing demons that terrorize and destroy everything in their path. If they aren’t stopped, humans won’t be the only endangered species. To preserve life and win the war against demons, protectors from different species all over the world have downloaded level-up programs to help them fight.

It was a day like any other when suddenly the world changed. The universe reached a threshold humanity didn’t even know existed, and it was time to finally be integrated into the vast multiverse. A place where power is the only thing anyone can truly rely on.

Zac was alone in the middle of the forest when the world changed... The whole planet was introduced to the multiverse by an unfeeling System... or God. A universe where an endless number of races and civilizations fought for power and dominion. Zac finds himself stuck in the wilderness surrounded by deadly beasts, demons, and worse. Alone, lost and without answers, he must find the means to survive and get stronger in this new cut-throat reality.

Fight, survive, adapt, and rely only on yourself. That is Derek’s creed and what's got him through the System Integration on Earth. Everything changed when the System came. Cute bunnies and beautiful butterflies became savage killing machines. Then the Invaders arrived with a single goal: to obtain ownership of this new habitable planet. War has raged ever since. None of this mattered much to Derek, aside from making living a little more perilous.

After his parents died, Alex Roth had one desire: become a wizard. Through hard work, he was accepted into the University of Generasi, the world’s greatest academy of wizardry.... Fate, however, had another plan. On his 18th birthday, he is Marked by prophecy as one of his kingdom’s five Heroes, chosen to fight the Ravener, his land’s great enemy. But his brand is "The Fool". Worst of the marks.

Rob didn't think of himself as anyone special, but when a pitch-black portal tried to wrap his best friend in chains, he stepped up without thinking and found himself ensnared instead. His moment of heroism results in being torn away from everyone he knew and loved, kidnapped by an unknown force that leaves him with a note in his pocket stating: "Good luck." After being thrown into the wilderness of Elatra, a hostile fantasy world ruled by levels, stats, progression, and bizarre video game logic, he finds himself entirely out of his depth.

Felix's life on Earth had become a series of dead-end jobs, ruined relationships, and rotating apartments smaller than most postage stamps. By all accounts, even his own, he was a coward. Too afraid to move forward, to take risks. Yet when given the chance to choose between risking his life or walking away from a deadly encounter, he didn't hesitate. Moments before his untimely demise, Felix was snatched from earth and thrust into a magical world known only as "The Continent". Empowered by the "System", he learns that he can strengthen himself through combat and dedication.

The decision to start a new life is never an easy one, but for Joe the transition was far from figurative. Becoming a permanent addition to a game world, it doesn't take long to learn that people with his abilities are actively hunted. In fact, if the wrong people gained knowledge of what he was capable of, assassins would appear in droves.

Max was a professional soldier, and extremely good at his job. Right up until it killed him. At the moment of his death, he meets Hildi the Valkyrie, and is given three options. Serve Odin in Valhalla as one of the Einherjar, fighting each day and celebrating each night until the battle of Ragnarok. Accept his death as final, and end his existence. Or be reincarnated as a Battleborne on a random unknown world. Max chooses to gamble! To live a new life, whatever that might entail.

Becoming a knockoff Dracula in tight leather pants was never part of Vincent’s plans. Neither was being summoned to another world by a cult of vampire wannabes. But both happened. Now, Vincent’s left to pick up the tattered pieces of his humanity as he tries to grow strong enough to keep his family safe. The world is filled with nightmares, and the looming threat of losing his soul stands between his goal and his reality, so it’s not like it will be too hard or anything. Hell should tremble. A good man is going to war.

After dying and being reborn into a world that's built like a video game, Jim has found himself stuck in a very old-world style new-player zone for low-level adventurers. Unfortunately, the zone fell out of use centuries ago, and no one told the monsters they were supposed to take it easy on the Noobs. Even worse, the only new player around is Jim. Jim has been given an opportunity, and he'll do his best to take advantage of it.

Accidentally murdered by a cleric in another universe during a botched resurrection, Arnold, a semi-pro gamer, wakes upon an altar to find himself incarnated into the overweight body of a farmer who could have been his fatter twin. He’s not the hero. He’s not the villain. He’s certainly not the chosen one who is there to save the world. He’s a clerical error. It could be a bad joke, but apparently, it happens so often that they have a standard procedure for returning you.

A teenage mage of humble birth and slightly above-average skill, Zorian is attending his third year of education at Cyoria's magical academy. A driven and quiet young man, he is consumed by a desire to ensure his own future and free himself of the influence of his family, resenting the Kazinskis for favoring his brothers over him. Consequently, Zorian has no time for pointless distractions, much less other people's problems.

Due to unusual circumstances, Randidly starts in an isolated dungeon far beyond his level, forced to rely on the mysterious Traveler Shal in order to learn and survive with the dangerous new status quo for his world. But survive he does, only to leave the dungeon and discover that while he experienced several hellish months in the dungeon, only half a day passed on Earth. Randidly's capabilities are now more than enough to help build a small enclave of survivors, but that doesn't mean balancing his sense of responsibility against the plots of an unfriendly town will be easy.

Tad Harrington, a video-game-loving 16-year-old high school student, was bullied relentlessly throughout his life. Tad’s Rebirth date has come. His last hope is to be reborn a slayer strong enough to enter the toughest dungeons where a life of power and luxury could await him. When things don’t go according to plan, Tad finds out he has a special Rebirth, one that can level up and grow stronger by defeating monsters.