Antichrist Siege Machine (abbreviated ACSM) is an extreme metal solo project formed by multi-instrumentalist Æthus L. in 2007. During its lifetime, ACSM has released a variety of albums, EPs, and splits exploring themes and elements of black metal, punk, and industrial. L. cites influences from Darkthrone, Leviathan, Revenge, and Ministry, among others. ACSM has collaborated with multiple artists to create various compilations, splits, and unplugged versions of songs throughout its career. Many of these works have received praise from metal fans and critics alike. Additionally, Antichrist Siege Machine produces its own artwork and music videos. The project remains active both live and in studio.