KAL Online is based on both traditional Korean tales and traditional MMORPG gameplay. There is heavy emphasis on PvP, with six modes available, each rewarding the player with points to upgrade skills and equipment. Alternatively, PvE and quests are available, working along the storyline about Ha-Nin, the Great King, and Ban-Go, a warrior who challenged the ruler with a demon army. KAL Online is supported by an item shop.