Slipknot is the debut studio album by American alternative metal band Slipknot. It was released on June 29, 1999 by Roadrunner Records, and later reissued in December 1999 with a slightly altered track listing and mastering, as a result of lawsuit. It was the first album by the band to be produced by Ross Robinson, who sought to refine Slipknot's sound rather than alter the group's musical direction.
The album spans many genres, but is generally noted for its extensive percussion and overall heavy sound. Slipknot was well received by fans and critics alike and was responsible for bringing Slipknot a large increase in popularity. The album peaked at number 51 on the Billboard 200, and has gone on to become certified double platinum in the United States, making it the band's best selling album.