Hallucinogen is Simon Posford, a producer of goa/psychedelic trance music from England, UK. His first album: Twisted, released in 1995 is considered one of the most influential goa trance albums in the history of the genre. The follow-ups, "Deranger" EP and "The Lone Deranger" album only cemented his influence. Simon Posford is also known for his collaboration with Raja Ram, together they form the cult psychedelic chillout act Shpongle.

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