Chaotic Apocalypse
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Around the entire planet, rifts from other dimensions opened, as monsters began to roam everywhere.
Creatures from other worlds of all shapes and sizes, containing all sorts of supernatural powers had emerged one after another, as dungeons also appeared, becoming nests for even more monsters.
It was a complete invasion!
The large cities began to fall just after a few hours since the Ragnarök started, people were being slaughtered without end, as giants, zombies, demons, beasts, and even god-like creatures chased them over.
Each one of such entities possessed their own power systems, different types of cultivation, or even their own world's systems, the more they killed the stronger they grew, some even devoured humans in masses, and others extracted their blood to grow stronger, there were all sorts!