Viper is a steel roller coaster located at Six Flags Darien Lake amusement park in Darien, New York, United States. Built by the newly-formed Arrow Huss, the ride opened in 1982 as the first roller coaster in the world to feature five inversions, surpassing Carolina Cyclone at Carowinds which featured four. Viper retained the inversions record until Vortex opened at Kings Island in 1987.