Hapkido is a highly eclectic Korean martial art that employs hand and leg strikes at long distance and joint locks and throws at close range, emphasizing circular motion. Fighting advantage is gained by using footwork and body position to increase leverage, avoiding a direct confrontation of strength. Hapkido evolved from jujitsu techniques brought from Japan to Korea following WWII.
During development of Mortal Kombat: Deadly Alliance, Hapkido was used as a placeholder fighting style for characters whose actual styles had yet to be implemented. This can be seen in many in-development screenshots of the game. This practice continued during the developments of Deception and Armageddon.