Kalonline is an MMORPG where the player is given a choice of characters of different classes, and their appearance customizable. The player can customize various attributes of their character as they progress throughout the game. Players can explore the abundant oriental fantasy world, where the sky and the land have been opened by Hanin, and the nation of Hwan has been built in the east. Also, the players can experience the special by Kalonline's transformations and job tree.