The creation of Jeff Waters and John Bates. Their first two albums are staples in the most influential albums of heavy metal ("Alice in Hell" and "Never, Neverland").

The band has undergone many line up changes, and officially now only consists of two members Jeff Waters and Dave Padden.

There has been a total of 5 vocalists (not including live members only), 7 guitarists, 8 bassists, and 9 drummers during their existence.

Famous vocalists have included John Bates, Randy Rampage and Joe Comeau.

Famous drummers have included Mike Mangini and Randy Black.