Aspiring youngster Oolong wants to become Grand Master of Kung-Fu. To achieve this, he has to defeat ten opponents (one after another, not all at the same time).
Nothing special so far, the mid-80s had their fair share of beat 'em ups (and many good ones). What sets Yie Ar Kung-Fu (I'll drop the capitalization seen on the title screen here) apart is the opponents. In the seminal hits of the time (Karate Champ and all), the player mostly faced faceless enemies who were identical to each other and also to the player. In Yie Ar (to shorten this even further), each opponent has his or her own sprite, his or her own moves and even his or her own weapon (!).
