Dragonica

Since the close of the Dragon War, dragons and humans lived in peace on separate worlds – humans on their homeland, and dragons exiled to the depths of the Aether.It was not to last. Consumed with the desire for revenge, the Dark Dragon Elga led a revolt that brought the death of the Dragon Lord and an invasion of the human world. One thousand years have passed since the Five Heroes of legend defeated Elga in battle, and imprisoned him in the labyrinth prison of the Shadow Cabinet.

More details,just link to the official site: dragonica.thqice.com