Yie Ar Kung-Fu (Chinese: 一二功夫; pinyin: yī èr gōngfū; lit. 'One Two Kung-Fu') is a fighting game developed and published by Konami for arcades. It first had a limited Japanese release in October 1984, before having a wide release nationwide in January 1985 and then internationally in March. Along with Data East's Karate Champ (1984), which influenced Yie-Ar Kung Fu, it is one of the games that established the basis for modern fighting games.
The game was inspired by Bruce Lee's Hong Kong martial arts films, with the main player character Oolong modelled after Lee (like Bruceploitation films). In contrast to the grounded realism of Karate Champ, Yie Ar Kung-Fu moved the genre towards more fantastical, fast-paced action, with various different characters having a variety of special moves and high jumps, establishing the template for subsequent fighting games. It also introduced the health meter system to the genre, in contrast to the point-scoring system of Karate Champ.