This band performs in horror movie-style masks and is called Slipknot. What is the name of their 1999 debut album?

Explanation

SlipKnot is an American heavy metal band formed in 1995. The band is originally from Des Moines, Iowa, and is known for always being seen wearing horror movie masks. Their releases include their debut album "Slipknot" (1999), "Iowa" (2001), "Vol. 3: (The Subliminal Verses)" (2004) and "All Hope Is Gone" (2008). SlipKnot have been involved in a number of controversies, including a law suit against Burger King.