Alien is the fourth studio album by Canadian extreme metal band Strapping Young Lad. It was released on March 22, 2005. The album was written by Devin Townsend and Gene Hoglan over a six-month time period. The album reached No. 32 on the Billboard Heatseekers chart and No. 35 on the Top Independent Albums chart.

Strapping Young Lad (SYL) was a Canadian extreme metal band formed by Devin Townsend in Vancouver in 1994. The band started as a one-man studio project; Townsend played most of the instruments on the 1995 debut album, Heavy as a Really Heavy Thing. By 1997, he had recruited permanent members; this line-up, which consisted of Townsend on vocals and guitar, Jed Simon on guitar, Byron Stroud on bass, and Gene Hoglan on drums, lasted until the band's dissolution.