in the US had Anthrax and then-emerging Seattle band Alice in Chains, who were the supporting act. Several albums, some of which had come to be known as technical thrash metal, were released in 1991, including Overkill's Horrorscope, Heathen's Victims of Deception, Dark Angel's Time Does Not Heal, Sepultura's Arise, Coroner's Mental Vortex, Prong's Prove You Wrong and Forced Entry's As Above, So Below. In 1991, Metallica released their eponymous album, known as "The Black Album". The album marked a stylistic change in the band, eliminating much of the speed and longer song structures of the band's previous work, and instead focusing on more concise and heavier songs. The album was a change in Metallica's direction from the thrash metal style of the band's previous four studio albums towards a more contemporary heavy metal sound with original hard rock elements, but still had remnant characteristics of thrash metal. It would go on to become the band's best-selling album and began a wave of thrash metal bands releasing more garage-oriented albums, or else more experimental ones. The era of 1991–1992 marked the beginning of the end of thrash metal's commercial peak, due to the rising popularity of the alternative metal and grunge movements. In response to this climate change, many thrash metal bands that had emerged from the previous decade had called it quits or went on hiatus during the 1990s, while half of the "Big Four" and other veteran bands began changing to more accessible, radio-friendly styles. Metallica was a notable example of this shift, particularly with their mid–to–late 1990s albums Load, and ReLoad, which displayed minor blues and southern rock influences, and were seen as a major departure from the band's earlier sound. Megadeth took a more accessible heavy metal route starting with their 1992 album Countdown to Extinction. Testament, Exodus and Flotsam and Jetsam all took a melodic/progressive approach with the albums The Ritual, Force of Habit, and Cuatro, respectively. One of the pioneers of crossover thrash, Corrosion of Conformity, began changing their sound into a slower and Black Sabbath-influenced heavy metal direction with their post-1980s output, adapting influences and textures of sludge, doom metal, blues, and southern rock on several of their albums, including Blind (1991), Deliverance (1994) and Wiseblood (1996). In the wake of the success of groove metal, instigated by Pantera (who went on to become one of the most successful heavy metal bands of