The music is generally of a much harder edge than Butler is known for in Black Sabbath. This is not a surprise, as the vocalist on his first album (Plastic Planet) was Burton C. Bell from Fear Factory, who is known for more driving and harder edged vocals than ever was displayed in Black Sabbath. Before taking on Bell as vocalist for Plastic Planet, Butler contacted Devin Townsend to perform on the album. However, due to Townsend's recent stint with Steve Vai and having had to sing lyrics not written by himself, he was unwilling to enter into another band where he would have no lyrical input. That album also featured Pedro Howse on guitars, as well as Deen Castronovo (of to come Journey fame) on drums. Bell did not stay with the band past the recording of Plastic Planet, due to Fear Factory commitments. In 1996, the band re-emerged with an exclusive track for the Mortal Kombat: More Kombat compilation, entitled 'Outworld' and featuring
Anger On Anger vocalist, Mario Frasca.
This proved to be a one-time collaboration and Frasca was replaced by Clark Brown from the band
Symatic for their second album Black Science, released in 1997. The g//z/r formation did play a few live dates in 1997 behind the release of the album, however this was not a full-fledged tour, most of these gigs were played concurrent to the Ozzfest tour of that year. The band opened for such folks as Bruce Dickinson, who was playing some live gigs at the time. Castronovo recorded, but did not play any of the live gigs. He was replaced on drums by Chad Smith (not to be confused with the Red Hot Chili Peppers drummer with the same name).
After the handful of live gigs in 1997, the band was mostly put on ice, as Geezer was busy with various things Black Sabbath related for quite a while. Geezer eventually got back into the studio with the same lineup that played the live gigs from 8 years previous, and recorded their third album, Ohmwork, which was released on May 9, 2005.