"Psywar" is a single by Norwegian black metal band Mayhem. Released on 25 April 2014 via Season of Mist, it serves as a teaser for their upcoming fifth full-length album, Esoteric Warfare. It contains two songs: one of them, the eponymous "Psywar", is scheduled to appear on Esoteric Warfare, while the second one, "From Beyond the Event Horizon", is a previously unreleased track recorded in 2012. The song's name is a colloquial abbreviation of the term "psychological warfare".