Tang Soo Do is a fighting style used by Havik in Mortal Kombat: Deception, Mortal Kombat: Unchained and in Mortal Kombat: Armageddon, and by Quan Chi in Mortal Kombat: Deadly Alliance and Mortal Kombat: Tournament Edition.
The Tang Soo Do or Tangsudo (당수 도 or 唐 手 道 or taŋsudo, "the art of the slash / knife") is a traditional martial art of Korea. It is focused on the discipline and practice of forms and sequences of self defense. Hwang Ki, founder of this art, claimed to have developed it from ancient texts on subak (an older Korean martial art) while living in Manchuria in the 1930s. Okinawan and Japanese Karate, as well as internal Chinese martial arts have left influences in it. Tangsudo is similar in many aspects to Karate Do and Taekwondo.
Chuck Norris, the famous martial artist and actor, learned Tang Soo Do while in the military in Korea.