Arkmeria Conquer Online - ACO is a Virtual Reality Massive Multiplayer Online Role-Playing Game (VRMMORPG), played in Oracle Headgear; a futuristic headpiece that mostly encloses the user's eyes under neural haptic glass, enabling the device to transfer the player's seven senses in a completely simulated world.

ACO's gameplay consists of skill-building and class cultivation. The game offers endless possible quests to grind, and once every month, the real challenge commences. The players from each faction showcase their capability by conquering other nations. Once a nation managed to conquer Arkmeria by shattering all of Sovereign Catalyst, the world setting will revert to normal, and the devastated cities and kingdoms will be rebuilt once again in the virtual world.

Alfura Continent - the continent located in the southeast hemisphere, consisting of three mainlands, the Alfahim Kingdom, Farasia Empire, and Pandora Alliance.

Ceresia Continent - also called the continent of the horizon, located at the edge of the western expanse, occupied by Goldendusk Republic, Tartarosa Kingdom, and Grand Duchy of Saralies.