Ragnarok Online

In the land of Midgard, the existence of peace eventually led the humans to erase their memories of the scars and hardships of the wars in the past. Not remembering the faults of the past, culture was spreading throughout the land along with selfishness, corruption, and arrogance.

Then one day, strange occurrences started happening, breaking the balance that once existed in Midgard. There came a strange howl from the boundaries that divided the humans, God, and demons; creatures began attacking; increasing earthquakes and hail - and...
The mysterious legend of demons...
As the fragile peace began to fall apart, stories about the parts of Ymir, protecting the peace, began to spread among the adventurers. Forgetting the true nature of it, people set out to seek each of the pieces for their own selfishness, and the wealth that would come with it...