Sadus is an American thrash metal band from Antioch, California, active from 1985[A] to 2015, and reunited in 2017. Originally a quartet, the band's sound fuses thrash metal with death metal, featuring highly technical musicianship. They are known for the unique death growl of vocalist Darren Travis, and bassist Steve Di Giorgio. During their career, Sadus has released six studio albums, one compilation album and four demos, and had two lineup changes, with the band continuing without replacing any of the departed members.

Obituary is an American death metal band formed in Tampa, Florida, in 1984. They were one of the fundamental acts in the development of death metal music, and are one of the genre's most successful bands of all time. Obituary has released eleven studio albums, and with the exception of a six-year hiatus from 1997 to 2003, they continue to perform live.