Kal Online is an MMORPG created by the Korean company Inixsoft in February 2004. The player is given a choice of characters of different classes, their appearance customisable. The player can customize various attributes of their character as they progress throughout the game.
Beginning at level one, the player must work their way up through the government positions of the individual classes to gain skills and unlock new quests. Each class has its own strengths and weaknesses. In order to level up players must kill monsters to gain experience points. Experience points the player gains from killing monsters varies, depending on factors such as player level, monster level, experience events/scrolls etc. With the latest job changes added, there are 6 jobs per class. Beginning at the most basic job (called government position in-game), you must make 3 job changes to have the best skills of the character’s class, the further the player advances up the government chain, the better and stronger skills become for PVP (Player vs Player) and PVM (Player vs Mob).

The game currently had two international servers: Hanin and Naraeha. Recently, Cheios server (Polish) has been added.
Server one (Hanin), has existed since KalOnline opened in 2004 and currently has the most players. Naraeha was then released two years later. Bango, the third and newest server, had the least number of players, but now its closed. Initially the game was only available in Korea, but due to large popularity in Korea, an international server was later added.