A Sorcery Written in Blood was the first demo released by Norwegian black metal band Gorgoroth.

[1] The title of the demo was taken from the lyrics of the song "The Return of Darkness and Evil" by the band Bathory.

The demo was released in 1993 as a limited edition hand-numbered cassette.

Due to the Satanic imagery used on the demo cover, the newspaper Firda in Førde in Sogn og Fjordane, Norway, ran a front-page story on the demo and Gorgoroth on 7 January 1994.

The track "Sexual Bloodgargling" was an early version of the song "Ritual", re-recorded for Gorgoroth's first album Pentagram.