Slipknot is the debut studio album by the American heavy metal band Slipknot. It was released on June 29, 1999, by Roadrunner Records, following a demo containing a few of the songs which had previously been released in 1998. Later, it was reissued in December 1999 with a slightly-altered track listing and mastering as the result of a lawsuit. It was the first release by the band to be produced by Ross Robinson, who sought to refine Slipknot's sound rather than alter the group's musical direction.