The Big Four: Live from Sofia, Bulgaria is a concert video with the bands Metallica, Megadeth, Slayer and Anthrax in it. These bands are known as the "Big Four" of American thrash metal.[1][2] The concert happened on June 22, 2010, at the Sonisphere Festival (a rock music concert) in Sofia, Bulgaria. It was shown at over 400 movie theaters in the United States, and over 300 theaters in other countries.[3]
The DVD went to number one on the Billboard Music DVD Chart.[4] It also went to number one on music video charts in New Zealand, Australia, and the United Kingdom. It was certified gold in Germany and New Zealand.[5][6] The video gave Slayer their first platinum certification, because it was certified platinum in the United States and Poland.[7]