RPG Vault via IGN writes: "According to legend, the magical civilization of Atlantis attained its great prosperity from knowing how to create a material called Oriharukon. Naturally, many other nations asked and even begged for this information to be shared. Rather than granting these requests, the Atlantians reacted by closing their society to all outsiders. Anyone foolish enough to persevere was dealt with swiftly and harshly, by sheer force. In time, however, the entire supply of the four crystals required to formulate the substance were exhausted. Destructive campaigns were quickly mounted to conquer the rest of the world in the desperate hope of finding more.
The lore for Ndoors' Atlantica Online says that without the powers provided by the Oriharukon, Atlantis soon disappeared. However, it seems some of the material still exists after all. What's more, it's poisoning the gameworld, which combines elements from our real one and mythology. Not surprisingly, the players' primary objective is to prevent this from producing a complete global disaster. Launching this year, the massively multiplayer title emphasizes strategic thinking while mixing in a range of noteworthy features like turn-based combat, an advancement system that applies to both the player characters and their NPC mercenaries, and a territory management component."