Zyklon-B was a Norwegian black metal supergroup founded in 1995.

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article does not cite any sources. (April 2019) The topic of this article may not meet Wikipedia's notability guideline for music. (October 2023)

This article does not cite any sources containing significant coverage. (October 2023)

The band's members were Tomas "Samoth" Thormodsæter Haugen (guitar and bass) and Vegard "Ihsahn" Sverre Tveitan (keyboard) from Emperor, Kjetil "Frost" Haraldstad (drums) from Satyricon and Björn "Aldrahn" Dencker Gjerde (vocals) from Dødheimsgard. Their lyrics dealt mainly with death, apocalypse and warfare. The band recorded only one EP; other versions of the featured songs were featured on split releases with Mayhem and Swordmaster.

The band Zyklon featuring members of Zyklon-B is often incorrectly thought to be the same band. The name refers to Zyklon B, a gas used in gas chambers during the Holocaust. Despite the name the band states that "Zyklon-B is not related to any political or racial preference".

• Blood Must Be Shed EP (1995)
  1. "Mental Orgasm" – 2:54
  2. "Bloodsoil" – 2:25
  3. "Warfare" – 5:35
• Blood Must Be Shed / Wraths of Time split EP with Swordmaster (1996)
  1. "Mental Orgasm" – 2:54
  2. "Bloodsoil" – 2:25
  3. "Warfare" – 5:35
  4. "Wraths of Time" – 5:37
  5. "Upon Blood and Ashes" – 5:17
  6. "Conspiracy - Preview" – 2:56
• Necrolust / Total Warfare split single with Mayhem (1999)
  1. "Necrolust (Unreleased Studio Version)" – 3:43
  2. "Total Warfare (Sea Serpent Remix)" – 5:46