Crossover Thrash adalah genre yang bisa disebut penggabungan antara musik Thrash metal dengan Hardcore/Punk. Istilahnya disebut sejak adanya transisi album dari
D.R.I - Crossover pada era akhir 80'an, jadi bisa dibilang D.R.I adalah pencetus dari istilah genre Crossover. Juga dengan banyak band lainnya seperti Cryptic Slaughter, S.O.D, Nuclear Assault, M.O.D, Anihilated hingga yang paling dilematis Suicidal Tendencies.
Crossover thrash, often abbreviated to crossover, is a form of thrash metal that contains more hardcore punk elements than standard thrash. It is sometimes referred to as punk metal, though this is generally incorrect due to the existence of other music genres that combine forms of punk rock and heavy metal, such as grunge and crust punk. While thrash metal is heavily influenced by hardcore punk, the overall sound of crossover thrash is more punk-influenced yet more metal-sounding and aggressive than traditional hardcore punk and thrashcore. The term was coined by the band D.R.I. with their album Crossover, released in 1987.
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Crossover thrash evolved when performers in hardcore punk and heavy metal began borrowing elements of one another's music. Despite some opposition from "purists" in both camps, the marriage seemed natural, since both punk and metal styles were intense, riff-driven, and often, but not exclusively, manically uptempo. Punk-based metal bands generally evolved into the genre by developing more musical technique than the average hardcore outfit, and getting bored with the musical limitations of "pure" hardcore (which focused on very fast tempos and very brief songs). Especially early on, crossover thrash had a strong affinity with skate punk, but gradually became more and more the province of metal audiences. The scene gestated at a Berkeley club called Ruthie's, in 1984. The term "metalcore" was originally used to refer to these crossover groups. Hardcore punk groups Corrosion of Conformity, Dirty Rotten Imbeciles and Suicidal Tendencies played alongside thrash metal groups like Anthrax, Metallica and Slayer. This scene influenced the skinhead wing of New York hardcore, which began in 1984, and included groups such as Cro-Mags, Murphy's Law, Agnostic Front, and Warzone. Other prominent crossover thrash groups include Nuclear Assault, SSS , Stormtroopers of Death, Cryptic Slaughter, SSD, DYS, GWAR, and Septic Death. British bands such as Electro Hippies, the Exploited and Discharge were hugely influential as well."
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