The Eighties Matchbox SOAD Tour Sampler, usually referred to as the System of a Down Tour Sampler, is an unnamed compilation album by The Eighties Matchbox B-Line Disaster. It was sold during System of a Down's 2005 UK tour. Eighties Matchbox was the support act on this tour, and the album was a method of promoting the band to a new fan base. It compiles songs from the band's album, The Royal Society, and B-sides from the singles "Horse of the Dog" and "The Royal Society".