Fantastic Tribulation

A modern-day setting where the world has been through an event where monsters seen from RPG fantasy have appeared throughout Earth. Concurrently, people with supernatural powers similar to those found in role-playing games fight such creatures.

Anime and Manga

 * The World Is Overflowing with Monster, I’m Taking a Liking to This Life where the world has been devastated by monsters with no access to electricity and other modern conveniences. People can use an RPG-like system that gives them skills, jobs, and stats, but animals and monsters also utilize this system.
 * JK Musou - Owaru Sekai no Sukuikata has monsters start rampaging throughout the world, which leads to civilization decline. The protagonist, a hikikomori girl, learns that she can level up like in an RPG. She also can gain new skills and use magic. She then integrates into a group of people that system they use called ‘Players’. These people can exterminate monsters and save people around them during this cataclysmic time.
 * In Bouken-ka ni Narou!: Skill Board de Dungeon Kouryaku, An event known as 'The Stampede' happened five years ago where dungeons have appeared worldwide along with monsters accompanying in a massive number. Civilization has bounced back as the government allows people to become Adventurers to venture into dungeons defeating monsters and level up from the XP while gaining magical items and equipment.

Literature

 * System Apocalypse causes various creatures such as monsters and aliens, to appear on Earth, including no modern technology, but the System helps by acting like an RPG for people. It also provides other services such as functions for buildings and providing necessities if preconditions are met.
 * In The S-Classes that I Raised, dungeons have appeared worldwide where monsters spill out, leading to catastrophe for the population. Awakened are people who simultaneously emerge that use supernatural abilities, level up, and check their status through interfaces.
 * The New World series by James Khan, consisting of World Enough, and Time (1980), Time's Dark Laughter (1982) and Timefall (1987), set in a world where magic came back and technology abruptly stopped working, and the creatures of myth reappeared.

Web Comics

 * microHUNTER has everyone in the world shrinks down to 3cm, where items like insects, birds, rats, and even doors are dangerous. However, people are granted abilities that have their strength determined by a level while also checking their status through game-like windows.
 * The webtoon, Solo Login, has Players that can access places filled with monsters to level up while gathering money and equipment. Sky Players can access Sky Castles while Underground Players can enter Underground Dungeons, which monsters can travel outside, attacking cities if not subdued.
 * In I am the Sorcerer King, ten years ago, portals called Rifts appear worldwide, where countless monsters pass through and cause chaos. People called the Awakened are connected to the Ahkasha System under the Director of Ahkash and allows the Awakened to access notification windows, acquire a job, level up from experience, grind stats, and gain skills.
 * In Omniscient Reader’s Viewpoint, has the world go through an apocalyptic event where people must participate in deadly Scenarios for cosmic live streamers. Every person is granted unique skills while also gaining coins that can be used to upgrade these skills.
 * Raid (SF) has a setting where a supercomputer has taken over the world by introducing nanomachines worldwide. Everyone has a watch-like device called a Nanocircle, which augments their abilities and grants equipment, including getting rewards from various quests given by the computer.
 * In Solo Leveling, Portals around the world called Gates connected to another dimension dubbed a Dungeon where monsters termed Magic Beasts. Simultaneously, people known as Hunters appeared with magical powers that can fight these beasts while keeping the public safe from them.
 * Kill the Hero has Dungeons appearing around the world where monsters poured from portals. At the same time, divine beings called Nimbus appeared that grant a small number of people called Players with a power called the Authority. A Player has access to skills depending on the Nimbus while being able to level up and check their status through system displays.
 * In Raid, 50 years ago, Demon World Gates appeared worldwide and opened to the Demon World where Demon crossed these portals and devastated the world. Concurrently, God then granted humans called Masters (people with powers that co-relate to roles found MMORPGs like Tanker, Melee DPS, and Healer) the ability to stand up against these monsters and group together to destroy the demons and gates dubbed Raids.