Cosmosis (with Jez Van Kampen) were one of the original artists that along with Total Eclipse, Hallucinogen, Man With No Name and Astral Projection, that pioneered the goa and psytrance sound in the early nineties.
Cosmosis first album - the seminal Cosmology - was one of the first goa or artist albums. Released in 1996 it is widely regarded as one of the few classic albums in that genre.