The band spent most of 1985–86 on tour for Feel the Fire, initially as a support act for Megadeth on the United States tour for their 1985 album Killing Is My Business... and Business Is Good!, after which they toured Europe with Anthrax and Agent Steel. Based on the success of Feel the Fire, Overkill signed a recording contract with Atlantic Records in 1986, although they would still remain on Megaforce until Horrorscope (1991). As of October 1997, Feel the Fire had sold over a million copies worldwide, making it one of Overkill's best-selling albums.
The final track, "Sonic Reducer", is a cover of a 1977 song by punk rock band The Dead Boys; it was not included on the vinyl or cassette versions of the album, and on some CD reissues it was instead placed between "Second Son" and "Hammerhead". "Rotten to the Core" has been a mainstay of the band's live setlist since 1984.