Harry Roesli Gang was an Indonesian rock band formed in 1978 by the legendary guitarist and composer Harry Roesli. Known for their experimental and progressive sound, the band blended elements of rock, jazz, and traditional Indonesian music. Their music often explored themes of social and political consciousness, and they became known for their energetic live performances. Harry Roesli Gang released several albums throughout their career, including "Philosophy Gang" and "Opera Rock Ken Arok," before disbanding in 1982. Despite their relatively short lifespan, the band left a lasting impact on the Indonesian music scene and is considered one of the pioneers of Indonesian rock music.