The end of the world is coming, and a mysterious force regularly and randomly "summons" people on the earth to various extremely dangerous "copies of the end of the world."
There are all kinds of dungeon types (zombie siege, extreme natural disasters, weird rules, alien lairs, spiritual pollution, ancient battlefields, etc.).
The player's only main task is to "survive" until the end of the instance time. There is an "Apocalypse Forum" that connects all players and an "Apocalypse Ladder Ranking" based on performance, clearance evaluation, and strength rankings.
Top players (S-level, A-level) are like supermen, possessing various extraordinary abilities and equipment, forming powerful guilds, and enjoying high reputation on the forum. Death is real death.
