Hybrid Theory is the debut album by the American nu metal band Linkin Park. Released on October 24, 2000 by Warner Bros. Records, Hybrid Theory received much critical acclaim and proved to be a commercial success worldwide, peaking at #2 in the U.S. Billboard 200 and charting in eleven other countries. The album also helped Linkin Park to achieve themselves as one of the leading bands in the nu metal scene.
Hybrid Theory also produced four hit singles “One Step Closer”, the Grammy Award-winning “Crawling”, “Papercut” and “In The End”. Considered the best and most influential Linkin Park record, the diamond album has sold 24 million copies worldwide as of 2006, making it the highest selling debut album of the twenty-first century and remains the band's best-selling album.