Terrorizer was an extreme music magazine published by Dark Arts Ltd. in the United Kingdom. It was released every four weeks with thirteen issues a year and featured a "Fear Candy" covermount CD, a twice yearly "Fear Candy Unsigned" CD, and a double-sided poster. It ceased publication in 2018 after nearly 25 years.

Terrorizer published its first issue in October 1993 with Sepultura on the cover and a price of £1.95. "Sure, the layout was a bit ropey, with several 'cut out'-style pictures in the live section and some horribly lo-fi video stills in the Pestilence feature, but what a line-up of bands! Sepultura, Morgoth, Entombed, Morbid Angel, At the Gates, Coroner, Dismember, Sinister, Death...it was a veritable smorgasbord of brutality."

The magazine's name derives from seminal grindcore band Terrorizer (which got the name from the death metal band Master's first demo in 1985) and as such the magazine was an early champion of the emerging death metal scene, a tradition that it carried on and expanded to include all sub-generes of heavy metal adopting the slogan "extreme music - no boundaries" in 2003 with issue 108, also the first part of the Thrash Special.

After a second issue with cover stars Carcass, the then editor, Rob Clymo, took a risk by putting Metallica on the cover which, although it caused controversy with elitists, symbolised a move towards broader musical coverage. Despite this, Terrorizer's pulse remained firmly on the extreme metal underground with Cradle of Filth winning best demo and Fear Factory best newcomer in the 1993 Readers' Poll.

Issue 11 saw Terrorizer celebrate its first birthday, covering hardcore punk in force with features on Suicidal Tendencies, Madball, Chaos UK and Pro-Pain. "There was a sense that the team were finally properly honouring the magazine's original pledge to cover all forms of extreme music."

In 1994, death metal began to get wider acceptance in the mainstream metal press, but black metal continued to be vilified or ridiculed, or both, creating a gap that Terrorizer filled by giving pages to bands like Enslaved, Emperor and Dissection, whilst the demo reviews continued to beat the trend, getting first listens of Behemoth and Amon Amarth.

The first covermount CD, entitled Noize Pollution 3 (the first two having been cassettes), appeared on issue 23 in 1995 and featured At the Gates, Six Feet Under, In Flames, Moonspell and Dissection. That year, Terrorizer also launched two phone services, "Deathline" and "Metal Mates", that were swiftly discontinued. "The former was a number you could call to actually listen to the whole of the interviews you'd read snippets of in the magazine, and the latter where you could register your personal details with a metal matchmaking agency."

With issue 28 in 1996, Nick Terry replaced Rob Clymo as editor and the issue saw a Burzum artwork poster. With issue 29, the new editor overhauled and expanded the album reviews, live reviews and introduced a black metal news column. The next two years were dominated by black metal vs hardcore punk debates, as the two forces then dominant in extreme music came head-to-head in the magazine. Issue 33 also featured a demo review of Public Disturbance, a Cardiff-based hardcore band whose members would go on to form Lostprophets. In 1997, the first incarnation of the Terrorizer website was launched; Emperor, Deicide, Vader and the return of Mayhem made the covers, and hardcore continued to get heavy coverage with Integrity, Shelter, the reformed Agnostic Front and a UK HC scene report that introduced Knuckledust.