Lunar Strain is the debut album by Swedish melodic death metal band In Flames. In this release, vocals were sung by Mikael Stanne, the vocalist of Dark Tranquillity, who was a session musician for In Flames at the time. The album is known for its "folky elements" with the inclusion of violins and acoustic guitars. In 1999, it was re-released in Japan and included all the tracks of the Subterranean EP, under the title Lunar Strain & Subterranean.