Atlantians became very prosperous

Atlantica Online is a Free to Play / Item Mall based MMOG by NDOORS Interactive. The game features traditional JRPG-styled turn based combat (a'la Final Fantasy) and allows players to assemble groups of up to 8 player-controlled mercenaries to utilize in battle.

Atlantians became very prosperous after they created the substance called Oriharukon. Wanting to learn the secrets of this mysterious material, many other civilizations implored the Atlantians to share their knowledge, but they refused, closing their door to outsiders.