Seal Online is mostly a point-and-click MMORPG; movement, combat, and many other commands are all controlled by mouse, though the combo system is done with the A, S, and D keys. The player can choose from 7 different classes to start with. However, if the player chooses to start with the Beginner, he/she can choose to job change into the other 6 classes when he reaches Level 10. 21 additional new classes were added in early 2009.