Karos Online is an upcoming fantasy MMORPG developed for NHN. The game features crisp, modern 3D graphics, more notable because of the game's small client size. Taking place in the land of Asmara, factions vie for the energy source Fletta, the life force of the land. The player's journey toward becoming the legendary Karos warrior is set against the backdrop of this ongoing battle.

Featuring quests, solo and mass PvP (including castle sieges), a robust crafting and resource system and more ways to advance your character. One of these ways uses Fletta gems to advance skills, grant buffs or apply enhancements to items in a leveling system alongside more traditional methods.

Karos Online distinguishes itself further with its dungeon types. These get progressively more difficult, and winning in one dungeon grants tickets to the next stage. The English version of Karos Online is set to debut along with the Korean version in fall 2009, with German and Turkish versions rolling out later.

Karos will be free to play, and an item shop is expected.